Sherman v. Westinghouse Savannah River Co. , 263 F. App'x 357 ( 2008 )


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  •                             UNPUBLISHED
    UNITED STATES COURT OF APPEALS
    FOR THE FOURTH CIRCUIT
    No. 04-2414
    JAMES SHERMAN, III,
    Plaintiff - Appellant,
    versus
    WESTINGHOUSE SAVANNAH RIVER COMPANY; BECHTEL
    SAVANNAH RIVER, INCORPORATED,
    Defendants - Appellees,
    and
    THE BABCOCK & WILCOX SAVANNAH RIVER COMPANY,
    INCORPORATED; BRITISH NUCLEAR FUELS LIMITED
    SAVANNAH RIVER CORPORATION,
    Defendants.
    No. 04-2417
    ANNIE B. LOTT-ABNEY,
    Plaintiff - Appellant,
    versus
    WESTINGHOUSE SAVANNAH RIVER COMPANY,
    Defendant - Appellee,
    and
    BECHTEL SAVANNAH RIVER, INCORPORATED; THE
    BABCOCK & WILCOX SAVANNAH RIVER COMPANY,
    INCORPORATED; BRITISH NUCLEAR FUELS LIMITED
    SAVANNAH RIVER CORPORATION,
    Defendants.
    No. 04-2418
    ELVIRA JOHNSON,
    Plaintiff - Appellant,
    versus
    WESTINGHOUSE SAVANNAH RIVER COMPANY,
    Defendant - Appellee,
    and
    BECHTEL SAVANNAH RIVER, INCORPORATED; THE
    BABCOCK & WILCOX SAVANNAH RIVER COMPANY,
    INCORPORATED; BRITISH NUCLEAR FUELS LIMITED
    SAVANNAH RIVER CORPORATION,
    Defendants.
    No. 04-2420
    DIANNE S. SCOTT,
    Plaintiff - Appellant,
    versus
    WESTINGHOUSE SAVANNAH RIVER COMPANY,
    2
    Defendant - Appellee,
    and
    BECHTEL SAVANNAH RIVER, INCORPORATED; THE
    BABCOCK & WILCOX SAVANNAH RIVER COMPANY,
    INCORPORATED; BRITISH NUCLEAR FUELS LIMITED
    SAVANNAH RIVER CORPORATION,
    Defendants.
    Appeals from the United States District Court for the District of
    South Carolina, at Aiken.      Henry F. Floyd, District Judge.
    (CA-00-1649-1-26AJ; CA-00-1652-1-26AJ; CA-00-1689-1-26AJ; CA-00-
    1715-1-26AJ)
    Argued:   May 22, 2007                  Decided:   February 7, 2008
    Before WILKINSON and KING, Circuit Judges, and WIDENER,1 Senior
    Circuit Judge.
    Nos. 04-2414, 04-2417, and 04-2418 affirmed; No. 04-2420 affirmed
    in part and vacated and remanded in part by unpublished per curiam
    opinion.
    ARGUED: Ivan D. Smith, VLADECK, WALDMAN, ELIAS & ENGELHARD, P.C.,
    New York, New York, for Appellants. Glen David Nager, JONES DAY,
    Washington, D.C., for Appellees.      ON BRIEF: Ray P. McClain,
    Charleston, South Carolina, for Appellants. Shay Dvoretzky, Thomas
    J. Davis, JONES DAY, Washington, D.C.; Deborah A. Sudbury, Douglas
    M. Towns, JONES DAY, Atlanta, Georgia; Kenneth E. Young, NELSON,
    MULLINS, RILEY & SCARBOROUGH, Greenville, South Carolina, for
    Appellees.
    1
    Judge Widener heard oral argument in this case but died prior
    to the time the decision was filed. The decision is filed by a
    quorum of the panel. 
    28 U.S.C. § 46
    (d).
    3
    Unpublished opinions are not binding precedent in this circuit.
    4
    PER CURIAM:
    The four appellants — James Sherman, III (No. 04-2414), Annie
    B. Lott-Abney (No. 04-2417), Elvira Johnson (No. 04-2418), and
    Dianne S. Scott (No. 04-2420) — appeal from the judgments entered
    against them in the District of South Carolina on their race
    discrimination claims under the Civil Rights Act of 1866, 
    42 U.S.C. § 1981
    , and Title VII of the Civil Rights Act of 1964, 42 U.S.C.
    §§   2000e   to   2000e-17.       In    their    consolidated      appeals,      the
    appellants     challenge    the    district       court’s   denial      of     class
    certification     on    their    disparate      impact   claims;    the      court’s
    exclusion    of   the   report    and   proposed    testimony      of   an    expert
    witness; and the court’s awards of summary judgment against them on
    their individual disparate impact and disparate treatment claims.
    We possess jurisdiction over these appeals pursuant 
    28 U.S.C. § 1291
    .     For the reasons explained below, we affirm in Nos. 04-2414
    (Sherman), 04-2417 (Lott-Abney), and 04-2418 (Johnson), and we
    affirm in part and vacate and remand in part in No. 04-2420
    (Scott).
    I.
    On October 31, 1997, ten African-American employees at the
    U.S. Department of Energy’s Savannah River Site (the “Site”) filed
    a class action complaint under § 1981 and Title VII on behalf of
    all African-American Site employees.              The proposed class action
    5
    eventually accumulated ninety-nine named plaintiffs, including the
    four      appellants    herein.         The     district     court    denied     class
    certification and directed the plaintiffs to proceed individually.
    Of the ninety-seven plaintiffs who refiled individual complaints,
    all but five — the four appellants herein and Virginia Anderson —
    subsequently settled or otherwise dismissed their claims.                           We
    previously heard the appeal of Anderson, who also challenged the
    denial of class certification, as well as the entry of summary
    judgment on her individual claims.                Our decision in that case —
    authored by our late and distinguished colleague Judge Widener —
    outlines the history of the proposed class action and provides
    authority for the disposition of several issues in the present
    appeals. See Anderson v. Westinghouse Savannah River Co., 
    406 F.3d 248
     (4th Cir. 2005).
    The   plaintiffs’     claims   were     brought    against     Westinghouse
    Savannah River Company; Bechtel Savannah River, Incorporated; The
    Babcock & Wilcox Savannah River Company, Incorporated; and British
    Nuclear Fuels Limited Savannah River Corporation.                     The defendants
    jointly operate and manage the Site, a 310-square-mile facility
    that processes radioactive and other hazardous waste. They operate
    as   a    “seamless    organization”      under     a    1996   contract    with   the
    Department       of   Energy   and   have       common    personnel    policies    and
    practices, including performance evaluation systems, promotion
    policies,       and   compensation      policies,        controlled    by   a   single
    6
    director of human resources. Various policies and practices of the
    defendants have been challenged by the plaintiffs in the proposed
    class action and their subsequent individual suits, under theories
    of both disparate impact and disparate treatment based on race.2
    A.    Class Certification
    By way of their disparate impact claims, the plaintiffs
    variously    attacked   the   defendants’   practices    affecting   five
    discrete aspects of employment — (1) promotions and evaluations,
    (2) hazardous job assignments, (3) salaries, (4) training, and (5)
    demotions.    The plaintiffs initially sought certification of a
    single class, encompassing more than 4,000 African-American Site
    employees, for these claims.      In a reply memorandum on the issue of
    certification, however, the plaintiffs suggested for the first time
    that the court could break the class into three separate subclasses
    for exempt, nonexempt, and craft employees.          The district court
    denied class certification on May 25, 2000.         The court determined
    that the plaintiffs’ claims lacked sufficient “commonality” and
    “typicality” to satisfy Federal Rule of Civil Procedure 23(a)(2)
    and (3).    Moreover, the court ruled that the plaintiffs failed to
    demonstrate that at least one of the conditions of Rule 23(b) was
    2
    The plaintiffs have relied on evidence of race-related
    harassment in the workplace as relevant background. In particular,
    the plaintiffs allege that hangman’s nooses and racist graffiti
    appeared throughout the Site, that there was open use of racial
    epithets, and that management did not remove the graffiti in a
    timely fashion or adequately respond to other instances of
    harassment.
    7
    met. Notably, the court considered the feasibility of the proposed
    subclasses, and concluded that none of them could “overcome the
    fatal deficiencies afflicting the larger proposed class.”
    The plaintiffs filed a motion for reconsideration of the class
    certification ruling, in which they abandoned their request for a
    single omnibus class, and instead asked for certification of as
    many as eleven different subclasses.            On July 19, 2000, the
    district court denied the motion for reconsideration, rejecting the
    plaintiffs’ modified class certification request as untimely and
    lacking     in   merit.   Thereafter,   the    plaintiffs   filed   their
    individual lawsuits.
    In her appeal, Anderson contended that the district court
    should have certified two subclasses corresponding to her two
    individual disparate impact claims, pertaining to the defendants’
    systems for promotions and salaries.          See Anderson, 406 F.3d at
    273.       We rejected Anderson’s contention on the ground that —
    having affirmed the awards of summary judgment on her disparate
    impact claims — she had “no valid claims which give her the same
    interest and cause her to suffer the same injury as the proposed
    class members she seeks to represent.”            Id. at 274 (internal
    quotation marks omitted).3
    3
    With respect to the class certification issue, we further
    observed in Anderson that there was “no indication” that any
    plaintiff could successfully prosecute a disparate impact claim
    challenging the salary system, without the rejected testimony of
    8
    B.    Disparate Impact Claims
    1.   Sherman’s and Scott’s promotion system claims
    Sherman and Scott claim (as Anderson did before them) that the
    defendants’ system for promoting employees — the Competency Based
    Posting System (the “CBPS”) — has a disparate impact on African-
    American employees.      Under the CBPS, which was instituted in the
    1990s, open positions are submitted to the Site’s Human Resources
    Group (“HR”) for posting. For each open position, a hiring manager
    establishes the minimum qualifications, identifies and weighs the
    relevant “core” and “functional” competencies, serves on the three-
    plaintiffs’ proffered expert on that claim. 406 F.3d at 274. We
    acknowledged the possibility, however, that a class action might
    yet be appropriate with respect to a disparate impact claim
    attacking the promotion system.    Id. at 275.   Accordingly, the
    panel majority agreed to remand with the following instructions:
    Upon remand, if a proper plaintiff or plaintiffs with
    grievances similar to those of Miss Anderson with respect
    to that discrete portion of the [promotion] procedure
    presents himself to prosecute, himself, as a class
    representative, the district court should then decide
    whether a class action is maintainable and whether the
    then named plaintiff should represent the class. . . .
    If no representative plaintiff so comes forward within a
    reasonable time, then the district court should strike
    the class action from the calendar and enter a final
    dismissal thereof.
    Id.; see also id. at 275-76 (Niemeyer, J., concurring in part and
    dissenting in part) (explaining disagreement with remand remedy).
    On October 17, 2005, the district court entered a final dismissal
    order in the original proposed class action, observing that five
    months had passed since the issuance of our Anderson decision and
    that, during that time, no proper representative plaintiff had
    stepped forward to pursue a class action on the promotion system-
    related disparate impact claim.
    9
    member interview panel, and assists HR in the selection of the
    other interview panel members.4
    During    the     first    of     three   stages   under    the     CBPS,
    “self-nominating individuals” submit their qualifications to HR, by
    way of a “Personal History” form, a resume, or both.                   HR then
    identifies those applicants who meet the minimum qualifications for
    the open position, and forwards their application materials to the
    hiring manager.      Next, during the CBPS’s second stage, the hiring
    manager (acting alone or with assistance of a committee) rates the
    applicants    according    to    the     weighted   core   and   functional
    competencies of the open position, and selects the most qualified
    applicants for interviews.           The interview panel conducts the
    interviews, produces written evaluations of the interviewees (based
    4
    We detailed the CBPS in our prior Anderson decision.                  We
    explained therein, inter alia, that
    [u]nder the [CBPS], hiring managers can evaluate
    applicants in six core competencies:            teamwork,
    leadership, communications, business results, self-
    management, and employee development.         The hiring
    managers can also evaluate applicants using selected
    functional competencies that are specific to the position
    for which the manager is hiring.         For example, a
    particular functional competency could be “proficient in
    heating, ventilation and air-conditioning design,” and
    the CBPS manual explains that “functional competencies
    can be derived from the responsibility section on the job
    description.”    Each competency is assigned a weight,
    using a number from one to five, in which five is “most
    important relative to other competencies” and one is
    “least important relative to other competencies.”
    406 F.3d at 256.
    10
    again on the core and functional competencies), and preliminarily
    identifies    the    most     qualified    candidate.      If   that   candidate
    receives approval from the next level of management, as well as HR,
    the CBPS process moves to its third stage, during which the
    candidate is offered the position.
    Sherman and Scott (like Anderson) specifically contend that
    the CBPS has a disparate impact on African-American employees at
    the second and third stages, relying on expert testimony that there
    is a statistically significant under-representation of African-
    American employees succeeding at those two stages.                 By separate
    orders,   the      district    court   granted   summary    judgment     to   the
    defendants    on    Anderson’s,    Sherman’s,    and    Scott’s   CBPS-related
    disparate impact claims.           Significantly, our panel majority in
    Anderson affirmed the summary judgment award on Anderson’s claim,
    see 406 F.3d at 265-68, with one panelist disagreeing on the
    disposition of this single issue, see id. at 276-84 (Gregory, J.,
    dissenting in part).5
    2.   Scott’s and Johnson’s radiation exposure claims
    Scott and Johnson allege that the defendants’ job assignment
    practices have resulted in African-American Site employees being
    5
    Anderson unsuccessfully petitioned this Court for rehearing
    en banc, with five judges voting to grant the petition, and seven
    judges voting to deny it. See Anderson v. Westinghouse Savannah
    River Co., 
    418 F.3d 393
    , 394 (4th Cir. 2005).       Judge Gregory
    dissented from the denial of rehearing en banc, criticizing the
    panel majority’s decision to affirm the summary judgment award on
    Anderson’s CBPS-related disparate impact claim.
    11
    exposed to more radiation than their white co-workers.          In support
    of their radiation exposure disparate impact claims, Scott and
    Johnson rely on the expert testimony of an epidemiologist, Dr. A.
    James Ruttenber.
    Importantly, the district court granted the defendants’ motion
    in limine to exclude Dr. Ruttenber’s testimony, at the conclusion
    of   a    hearing   conducted   pursuant   to   Daubert   v.   Merrell   Dow
    Pharmacies, Inc., 
    509 U.S. 579
    , 589 (1993) (recognizing that “the
    trial judge must ensure that any and all scientific testimony or
    evidence admitted is not only relevant, but reliable”).          The court
    determined that Dr. Ruttenber’s findings did not support the
    hypothesis that, during the relevant time period, African-American
    employees received higher radiation doses than white employees due
    to “management-initiated” job assignments.         This was so, the court
    observed, because Dr. Ruttenber failed to ascertain the extent to
    which employee choice — rather than decisions made by managers —
    resulted in higher exposure job assignments.         The court explained
    that “the problem that we have here is that there is no fit
    whatsoever between his analysis and the limited issue in this case,
    which is . . . whether or not discriminatory management-initiated
    job assignments produced a difference in radiation dose for black[]
    and white[]” employees. The court further concluded that, although
    Dr. Ruttenber (as an epidemiologist) may have been qualified to
    conclude that African-American Site employees had higher radiation
    12
    exposures than white employees, he went “beyond his realm of
    expertise” when he attempted to attribute such exposure rates to
    the defendants’ job assignment practices. And, the court noted and
    discussed “other flaws” in Dr. Ruttenber’s analysis.
    Thereafter,   having        excluded   evidence    (Dr.   Ruttenber’s
    testimony) crucial to sustaining Scott’s and Johnson’s radiation
    exposure   disparate    impact    claims,   the   district   court   awarded
    summary judgment to the defendants with respect to those claims.
    C.    Disparate Treatment Claims
    1.   Sherman’s failure to promote claim
    Sherman claims that he was denied a promotion to a Lead
    Technical Specialist position because of his race.             At the time
    Sherman applied for the promotion in December 1997, he had twenty-
    one years of experience working at the Site in various positions,
    including positions that arguably prepared and qualified him for
    the Lead Technical Specialist position. That position was awarded,
    however, to a white applicant (Jeffrey Stewart) who Sherman asserts
    was less qualified than him but the beneficiary of favoritism and
    preselection for the job.
    We focus herein on the facts tending to show that Stewart was
    preselected for the Lead Technical Specialist position. The hiring
    manager for that position, Mike Hubbard, initially sought to
    promote Stewart without going through the CBPS process, but was
    ultimately required by HR to post the opening.          The first posting
    13
    listed minimum qualifications including a bachelor’s degree and 5-8
    years of relevant experience.   Before applications were submitted,
    the posting was revised to no longer require a bachelor’s degree;
    the revised posting listed minimum qualifications including a
    bachelor of science degree in engineering and 5-8 years of relevant
    experience, or a bachelor of science degree in another discipline
    and 9-11 years of relevant experience, or an associate’s degree and
    13-15 years of relevant experience plus certain training, or a high
    school diploma and 15-17 years of relevant experience plus certain
    training.    In the light most favorable to Sherman, the evidence
    indicates that the posting was revised so that Stewart (who did not
    possess a college degree) would minimally qualify for the Lead
    Technical Specialist position, and that Stewart was provided with
    special training in an area in which his qualifications would have
    yet been lacking.
    Stewart and two African-American applicants (but not Sherman)
    were named as finalists for the Lead Technical Specialist position.
    Sherman scored only one point below the two African-American
    finalists.   Thus, had Stewart been ineligible for the job — as he
    would have been had the minimum requirements not been altered —
    Sherman would have been interviewed as a finalist.   The members of
    the interview panel, including Hubbard, were all white.    Stewart
    was selected for the Lead Technical Specialist position over the
    two African-American finalists.
    14
    To prove his failure to promote disparate treatment claim,
    Sherman relies (as do the other appellants with respect to their
    disparate    treatment      claims)    on    the   burden-shifting     framework
    established by the Supreme Court in McDonnell Douglas Corp. v.
    Green, 
    411 U.S. 792
     (1973).6          In awarding summary judgment to the
    defendants on this claim, the district court concluded that Sherman
    failed to forecast evidence sufficient to demonstrate that the
    defendants’ reasons for passing over Sherman were a pretext for
    discrimination.      Regarding the favoritism shown by Hubbard to
    Stewart, the court observed that Sherman failed to demonstrate that
    Stewart’s preselection for the Lead Technical Specialist position
    resulted    from   racial    animus.         The   court   explained   that   the
    defendants’ “decision to lower the requirements for the position
    and [Hubbard’s] preference for one particular employee affected all
    6
    Under this framework, as we recognized in Anderson, the
    plaintiff can establish a prima facie case of racial discrimination
    in promotions “by showing that (1) she is a member of a protected
    group, (2) she applied for the position in question, (3) she was
    qualified for that position, and (4) the defendants rejected her
    application under circumstances that give rise to an inference of
    unlawful discrimination.” 406 F.3d at 268. “If a prima facie case
    is established, the burden then shifts to the employer to
    articulate some legitimate, nondiscriminatory reason for the
    decision not to promote.” Id. (internal quotation marks omitted).
    “After the employer states a reason for its decision, [the
    plaintiff] has the opportunity to show that the stated reason is a
    pretext for discrimination, and the trier of fact must determine if
    the plaintiff has proved that the employer intentionally
    discriminated against her because of her race.”       Id. (internal
    citations omitted).
    15
    applicants equally. Moreover, favoritism alone does not constitute
    actionable discrimination.”
    2.    Scott’s disparate treatment claims
    a.    Scott’s failure to promote claim
    Scott alleges that, in 1998, she was denied a promotion to a
    Lead Technical Specialist position because of her race. Scott, who
    started working at the Site in 1980 and holds a master of business
    administration degree (“MBA”), succeeded at the first stage of the
    CBPS (being deemed minimally qualified for the open position) but
    failed at its second stage (being selected for an interview).
    According to Scott, she was more qualified than the white employee
    (Susan Hatcher) who received the promotion, in that she had more
    years   of   work    experience   at   the   Site   and   a   more   advanced
    educational degree.
    The posting for the Lead Technical Specialist position listed,
    among the minimum qualifications, the equivalent of a technical
    degree and 3-5 years of experience, or an associate’s degree in a
    technical discipline and 8-10 years of experience, or a high school
    diploma and 12-14 years of certain practical experience.                 The
    posting also listed several areas of required knowledge.                  HR
    determined that Scott met the minimum requirements for the open
    position, and forwarded her application (which included a “Personal
    History” form but not a resume) to the position’s hiring committee.
    The hiring committee — which consisted solely of white members —
    16
    indicated in its CBPS evaluation that Scott’s Personal History form
    contained “[i]nadequate information” to fully assess her candidacy
    or “to support selection for [an] interview,” and assigned Scott
    scores of “0” (for “not evident”) with respect to several of the
    weighted core and functional competencies.                   Scott (along with Bill
    Kesler, a white Site employee) received the lowest rating of all
    applicants for the position and was not selected for an interview.
    Hatcher, the prevailing candidate, began working at the Site
    in 1984, was promoted to a Laboratory Technician position in 1985,
    held a technical degree (in Environmental and Hazardous Material
    Management) directly relevant to the open Lead Technical Specialist
    position,     and   provided       a    detailed        application     specifically
    describing her experience, qualifications, and pertinent college
    class work.
    The district court granted summary judgment to the defendants
    on Scott’s failure to promote disparate treatment claim, based on
    its   conclusion    that    Scott        had    failed       to   forecast   evidence
    sufficient     to   demonstrate          that      the    defendants’        proffered
    legitimate, nondiscriminatory reason for promoting Hatcher — that
    she   “best   fit   the    job     description”          —    was   a   pretext     for
    discrimination.     The court observed that Scott’s only evidence was
    her   own   affidavit,     which       contained    a    self-assessment       of   her
    qualifications that was “irrelevant” and otherwise insufficient to
    create a genuine issue on the pretext question.
    17
    b.     Scott’s hazardous job assignment claim
    Scott also asserts that, based on her race, she was forced to
    take a job working with significantly more radioactive (and, thus,
    more    dangerous)      samples    than     those   handled    by   her   white
    counterparts.      Scott had been hired to work at the Site in 1980 as
    a mail clerk, and had been promoted in 1981 to a position since
    retitled “technical analyst.” From 1981 to April 1998, Scott’s job
    responsibilities involved analyzing radioactive samples.              In April
    1998, Scott was temporarily assigned to another work group at the
    Site   to   assist    in   the   disposal    of   “legacy   chemicals,”   i.e.,
    chemicals dating back to the 1950s. Scott subsequently returned to
    her regular work group and, in November 1998, was involuntarily
    assigned to the post at issue, which involved receiving (rather
    than analyzing) radioactive samples.
    It appears from the record that this “sample receiver” job (an
    assignment within the scope of the broader technical analyst
    position) was a new post at the Site limited to working with “BNFL”
    samples, i.e., highly radioactive samples that were significantly
    more radioactive than the samples more routinely handled within
    Scott’s work group.        In this post, Scott was required, inter alia,
    to “split” BNFL samples that would have otherwise been too high in
    radiation for her co-workers to analyze.            Prior to the creation of
    the new sample receiver job, the Site had previously analyzed just
    one set of the BNFL samples, and those samples had been handled by
    18
    the   two    then-existing       sample   receivers   along   with   all   other
    incoming samples.      The new sample receiver job was created to deal
    exclusively with the BNFL samples, based on lessons learned from
    experiences with the first set of BNFL samples.               The new job was
    posted      internally,    but    no   Site    employees   applied   for   it   —
    including      the   two   sample      receivers   (Gina   Robbins   and   Robin
    Wainwright, both white) who had handled the first set of BNFL
    samples.      Even though there had not been any particular problems
    with Robbins’s and Wainwright’s handling of the first set of BNFL
    samples, neither of them were required to take the new sample
    receiver job, and they continued working as sample receivers
    handling samples that were not highly radioactive.                   Additional
    candidates for the new sample receiver job included thirteen other
    white employees in Scott’s work group who, as technical analysts
    (like Scott), met the minimum qualifications for the assignment.7
    7
    Viewed in the light most favorable to Scott, the record
    indicates that the defendants have offered varying reasons for the
    choice of Scott for the new sample receiver job.      According to
    Scott, one of her supervisors, Marty Finney, informed her at the
    time of the assignment that she was selected for the new job
    because her advanced degree (an MBA) and administrative skills
    rendered her perfect for it. Finney testified in her deposition,
    however, that nothing about Scott’s education especially qualified
    her for the new sample receiver job.       Moreover, Finney denied
    telling Scott that she was selected, at least in part, because of
    her educational background. Rather, Finney asserted that she told
    Scott she was selected because she lacked a permanent assignment
    after returning to her work group from the temporary assignment
    disposing of legacy chemicals.      Meanwhile, Finney’s superior,
    Michael Polochko, testified that Scott was chosen because of her
    MBA and because Scott’s group had not had enough other work for her
    to do upon her return from the temporary assignment.       In this
    19
    In the spring of 1999, David Healy, a white employee who
    joined Scott’s work group after her assignment to the new sample
    receiver job, also became a sample receiver.        Scott was not moved
    from her sample receiver job (working exclusively with the BNFL
    samples)   at   that   time.   Healy’s    sample   receiver   assignment
    apparently occurred soon after Robbins shifted her job duties from
    receiving to analyzing samples. It is unclear whether Healy simply
    replaced Robbins working with non-highly radioactive samples, or
    whether Healy worked alongside Scott with the BNFL samples.            It is
    also unclear whether Healy was voluntarily or involuntarily placed
    in the sample receiver job.
    The record suggests that Scott’s duties as a sample receiver
    exposed her to appreciably more dangerous conditions than those she
    had previously faced.     For example, in the summer of 1999, Scott
    had a skin dose radiation reading of 149 MREM — well within the
    annual limit set by the federal government, but abnormally high for
    Scott and other employees in her work group (who were expected to
    have skin readings between 0 and 50 MREM).      This reading caused one
    of Scott’s supervisors, Michael Polochko, to warn Scott to watch
    future skin dose readings for additional high numbers.            Indeed,
    although   Polochko    testified   in   his   deposition   that   he    had
    encountered abnormal readings for employees on “several occasions,”
    appeal,   the   defendants  offer   the   work   shortage  as   a
    nondiscriminatory justification for Scott’s selection for the new
    sample receiver job.
    20
    he specifically recalled only one other incident, and in that case
    (unlike Scott’s) the high number was attributed to an equipment
    malfunction.   Polochko also acknowledged that, with respect to the
    annual whole-body exposure limits set by the Site, the limit for
    employees working with the BNFL samples (280 MREM) was higher than
    that for “most people” (150 MREM). Polochko refused to explain the
    discrepancy in the exposure limits.   A fair inference, however, is
    that the defendants expected employees working with the BNFL
    samples to suffer greater exposures than other employees. And, the
    defendants have acknowledged that the less exposure, the better —
    as evidenced by their ALARA (“as low as reasonably achievable”)
    policy at the Site.
    In awarding summary judgment to the defendants on Scott’s
    hazardous job assignment disparate treatment claim, however, the
    district court concluded that Scott failed to establish a prima
    facie case of discrimination, in that she could not demonstrate
    that her assignment to the new sample receiver job constituted an
    “adverse employment action” that “had some significant detrimental
    effect.”8   According to the court, the fact that Scott “could have
    been exposed to higher levels of radiation in the new job . . .
    8
    To establish the relevant prima facie case, the plaintiff
    must “raise an inference of discriminatory intent by showing that
    she was treated worse than similarly situated employees of other
    races,” and she must establish that her involuntary placement in a
    new position constituted an “adverse employment action.”       See
    Sterling v. Tenet, 
    416 F.3d 338
    , 345 (4th Cir. 2005).
    21
    does not evidence a significant detrimental effect,” because “[h]er
    radiation exposure levels exceeded neither [the defendants’] nor
    the federal government’s limits, and [the defendants have] numerous
    checks and monitors to prevent employees from being harmed by
    radiation.”
    3.    Johnson’s hazardous job assignment claim
    Johnson claims that, in the early to mid-1990s, she and other
    African-American painters at the Site were exposed to radiation
    more often than their white counterparts.              The district court
    granted summary judgment to the defendants on Johnson’s hazardous
    job assignment disparate treatment claim, for failing to establish
    a prima facie case of discrimination.         The court explained that
    [t]he only evidence [Johnson] presented in connection
    with this claim is her own affidavit and the affidavit of
    another African American employee of [the defendants].
    She also implies that it is the burden of [the
    defendants] to disprove [she] was not exposed to
    radiation more often than white employees by stating that
    [the defendant] offered no records comparing the
    assignments of its painter employees.
    The court concluded that, “[o]f course, it is not [the defendants’]
    burden to disprove [Johnson’s] claim, and [Johnson’s] assertions
    that   she   was   exposed   to   radiation   more   often   than   similarly
    situated white employees, without more, is insufficient to create
    a prima facie case of discrimination.”
    4.   Lott-Abney’s demotion claim
    Lott-Abney alleges that she was illegally demoted in 1995
    because of her race.      Lott-Abney began working at the Site in 1972,
    22
    and   was   working    in   an   exempt     position     as    an    M-Area     Records
    Management Coordinator in May 1995 during a Site-wide reduction in
    force (“RIF”).       Lott-Abney’s responsibilities involved collecting
    records from various facilities, packaging and processing the
    records, and sending them to the Site’s Record Control Department,
    as well as some procedure-writing duties. According to Lott-Abney,
    she was initially told that her work group would not be eliminated,
    but would instead be combined with a group of procedure writers in
    K-Area.     Lott-Abney was subsequently notified, however, that her
    position was being eliminated.              According to the defendants, the
    position    ceased    to    exist    upon   the    adoption     of    a   new    system
    requiring individual facilities to handle their own records.
    At the time of the RIF, a “bust back” policy was in place at
    the Site, under which certain exempt employees whose positions were
    eliminated    could    accept       demotions     to   their   former        non-exempt
    positions. Rather than being laid off, Lott-Abney accepted a “bust
    back” to a non-exempt position as a Reactor Materials Operator,
    effective May 15, 1995.
    Lott-Abney contends that, after the RIF, her former duties as
    Records Management Coordinator were given to Susan Power, a less
    senior white employee who had been a Production Supervisor in M-
    Area.     Power was assigned post-RIF to K-Area, where she did some
    procedure    writing       and   her   title      eventually        became    Training
    Instructor/Developer.        To demonstrate that Power’s new duties were
    23
    essentially the same as Lott-Abney’s old ones, Lott-Abney relies on
    the testimony of a former co-worker, John Cummings, who stated in
    his affidavit that Lott-Abney “was a procedure writer and manager
    of document control for the M-Area” prior to the RIF, and that
    Power “was writing procedures [in the K-Area], just as Mrs. Lott-
    Abney had done as a portion of her responsibilities in M-Area,
    before she had been demoted.”         Lott-Abney also points out that
    Power was given the same job title (“FLS-Operations Specialist”)
    and job code (“6646”) that Lott-Abney was assigned in her former
    Records Management Coordinator position.
    In granting summary judgment to the defendants on Lott-Abney’s
    demotion-related disparate treatment claim, the district court
    concluded, inter alia, that she failed to establish a prima facie
    case of discrimination.9      Specifically, the court observed that
    Lott-Abney     had   not   demonstrated    that   Power     was    assigned
    substantially the same duties that Lott-Abney had performed before
    her demotion — i.e., that Power had “filled” Lott-Abney’s former
    position.    The court emphasized that, while Cummings’s affidavit
    reflected that both Lott-Abney and Power engaged in some procedure
    writing, Cummings acknowledged therein that such activity was only
    “a   portion    of   [Lott-Abney’s]     responsibilities”     as    Records
    9
    Among the elements of the relevant prima facie case is that
    the plaintiff’s former position “was filled by [a] similarly
    qualified applicant[] outside the protected class.”       Hill v.
    Lockheed Martin Logistics Mgmt., 
    354 F.3d 277
    , 285 (4th Cir. 2004)
    (en banc).
    24
    Management Coordinator.     Additionally, the court determined that
    there was no significance to Lott-Abney (as Records Management
    Coordinator) and Power (as Training Instructor/Developer) having
    the same job title and job code, because the evidence showed that
    they were “generic titles used in [the defendants’] database to
    identify employees for compensation purposes and reflect little
    about the employees’ actual responsibilities and duties.”
    II.
    After the district court entered final judgments against them,
    Sherman, Lott-Abney, Johnson, and Scott timely noted their appeals.
    They make numerous appellate contentions, challenging the district
    court’s denial of class certification; the court’s summary judgment
    awards on their individual disparate impact claims (and, with
    respect to the radiation exposure disparate impact claims, the
    exclusion of Dr. Ruttenber’s expert testimony); and the court’s
    summary judgment awards on their individual disparate treatment
    claims.
    We review a district court’s class certification decision for
    abuse of discretion. See Gregory v. Finova Capital Corp., 
    442 F.3d 188
    , 190 (4th Cir. 2006).    We also utilize an abuse of discretion
    standard when reviewing a district court’s Daubert evidentiary
    rulings on the relevance and reliability of expert testimony.   See
    Bryte v. Am. Household, Inc., 
    429 F.3d 469
    , 475 (4th Cir. 2005)
    25
    (recognizing that “the district court has broad latitude in ruling
    on the admissibility of evidence, including expert opinion”). And,
    we review a district court’s grant of summary judgment de novo,
    viewing the facts in the light most favorable to the nonmoving
    party.    See Nat’l City Bank v. Turnbaugh, 
    463 F.3d 325
    , 329 (4th
    Cir. 2006).
    III.
    A.   Class Certification
    Because none of the plaintiffs have made meritorious disparate
    impact claims, see infra Part III.B, they cannot constitute proper
    class representatives, and the issue of whether the district court
    abused its discretion in denying class certification is moot.    See
    Anderson, 406 F.3d at 273-75.
    B.    Disparate Impact Claims
    1.   Sherman’s and Scott’s promotion system claims
    Sherman and Scott contend that the district court erred in
    granting summary judgment on their CBPS-related disparate impact
    claims.    Unfortunately for them, this contention is foreclosed by
    our prior Anderson decision, affirming the summary judgment award
    to the defendants on the essentially identical claim brought by
    Anderson.      See McMellon v. United States, 
    387 F.3d 329
    , 332 (4th
    Cir. 2004) (en banc) (recognizing “the basic principle that one
    panel cannot overrule a decision issued by another panel”). We are
    26
    therefore constrained to affirm the court’s awards of summary
    judgment on Sherman’s and Scott’s claims.
    2.    Scott’s and Johnson’s radiation exposure claims
    Scott and Johnson challenge the district court’s awards of
    summary judgment on their radiation exposure disparate impact
    claims.        As discussed above, the court made its summary judgment
    rulings after granting the defendants’ motion in limine to exclude
    the expert testimony of Dr. Ruttenber.                         Because the radiation
    exposure disparate impact claims depend on the expert testimony of
    Dr.   Ruttenber,        we   first   assess         the    propriety    of   the   court’s
    exclusion of that evidence.
    Simply put, the district court did not abuse its discretion in
    ruling,    at     the    conclusion       of    the       Daubert   hearing,   that      Dr.
    Ruttenber’s testimony must be excluded.                     Indeed, we agree with the
    court “that there is no fit . . . between [Dr. Ruttenber’s]
    analysis and the limited issue in this case, [i.e.,] whether or not
    discriminatory management-initiated job assignments produced a
    difference in radiation dose for black[] and white[]” employees.
    See Daubert, 
    509 U.S. at 591-92
     (recognizing that, to satisfy
    relevancy requirement, expert testimony must “fit” by providing “a
    valid     scientific         connection    to       the     pertinent    inquiry    as    a
    precondition to admissibility”).                    As such, we need not assess the
    other issues addressed by the court in excluding Dr. Ruttenber’s
    testimony.
    27
    Because we affirm the ruling of the district court excluding
    Dr. Ruttenber’s testimony, we also affirm the court’s summary
    judgment    awards    on    Scott’s      and    Johnson’s   radiation   exposure
    disparate impact claims.           Those claims relied on Dr. Ruttenber’s
    testimony and are unsustainable without it.
    C.    Disparate Treatment Claims
    1.     Sherman’s failure to promote claim
    Sherman maintains that the district court erred in granting
    summary judgment to the defendants on his failure to promote
    disparate treatment claim.          We agree, however, with the district
    court that the evidence fails to demonstrate that Sherman was the
    victim of race discrimination.             As Sherman himself asserts, the
    white employee given the promotion (Stewart) was preselected by the
    position’s hiring manager (Hubbard). While such preselection might
    demonstrate that Sherman and the other applicants were “unfairly
    treated, it does not by itself prove racial discrimination.”                  Blue
    v.   U.S.   Dep’t    of    Army,   
    914 F.2d 525
    ,   541   (4th   Cir.   1990)
    (explaining that, “[i]f one employee was unfairly preselected for
    the position, the preselection would work to the detriment of all
    applicants for the job, black and white alike”); see also Anderson,
    406 F.3d at 271 (invoking Blue in rejecting Anderson’s contention
    that preselection of employee for promotion constituted sufficient
    evidence for finding of pretext).               Sherman acknowledges our Blue
    precedent,    but    contends      that    he    can   nevertheless   show    that
    28
    Stewart’s preselection was discriminatory, based on evidence that
    the next three top-scoring applicants (including Sherman) were all
    African-American.            The record reflects, however, that Hubbard
    selected Stewart for the Lead Technical Specialist position before
    even posting the opening (much less receiving applications for it
    and scoring the candidates). In these circumstances, we affirm the
    district court’s summary judgment award on Sherman’s failure to
    promote disparate treatment claim.
    2.    Scott’s disparate treatment claims
    a.     Scott’s failure to promote claim
    Scott contends that the district court erred in awarding
    summary judgment to the defendants on her failure to promote
    disparate treatment claim.           We reject this contention and conclude
    that the court properly ruled that Scott’s claim failed for lack of
    evidence of pretext.          Indeed, we agree with the court that Scott’s
    reliance on a self-assessment of her qualifications was wholly
    insufficient to sustain her claim.              With particular respect to the
    proposition that Scott’s experience and MBA rendered her more
    qualified    for       the    promotion    than    Hatcher,   we    observe   that
    experience and education were only minimum qualifications for the
    open Lead Technical Specialist position, and that the promotion
    decision    was    made      based   on   the   weighted   core    and   functional
    competencies.       Cf. Anderson, 406 F.3d at 269 (recognizing, with
    respect to claim that Anderson was more qualified than promoted
    29
    white   employee     based    on    educational       background     and    years    of
    service, that “Anderson cannot establish her own criteria for
    judging her qualifications for the promotion,” but rather “must
    compete for the promotion based on the qualifications established
    by her employer”).
    Of course, Scott’s total score on the competencies was brought
    down by the “0” marks she received in several areas for lack of
    information in her Personal History form on which she could be
    assessed.      Scott does not dispute that she failed to submit
    detailed information with her application materials for the hiring
    committee’s review. Rather, she suggests that the committee should
    have looked beyond her application materials to ascertain her prior
    work performance, and in doing so would have realized that she
    possessed    the    requisite       skills      for   the   open    Lead    Technical
    Specialist position.         Along the same lines, the Anderson plaintiff
    contended that her scoring on a CBPS evaluation was inconsistent
    with prior positive performance reviews, and thus constituted
    evidence of pretext for the defendants’ failure to promote her.
    See   406   F.3d   at    271-72.      We     rejected    Anderson’s       contention,
    explaining that “[w]e do not sit as a super-personnel department
    weighing    the    prudence     of    employment        decisions    made    by     the
    defendants,”       and   that      “[w]e    cannot      require    that    different
    supervisors within the same organization must reach the same
    conclusion on an employee’s qualifications and abilities.”                     Id. at
    30
    272 (internal quotation marks omitted). Here, there is no evidence
    that the hiring committee evaluating Scott had any information
    before it other than what she included in her application, and we
    cannot say that the committee was obliged to seek out that which
    Scott herself did not provide. Accordingly, we affirm the district
    court’s grant of summary judgment on Scott’s failure to promote
    disparate treatment claim.
    b.    Scott’s hazardous job assignment claim
    Scott also challenges the district court’s summary judgment
    award to the defendants on her hazardous job assignment disparate
    treatment claim.       We agree with Scott that the court erred in
    concluding that she failed to establish her prima facie case.
    Contrary   to    the   conclusion   of   the   district   court,   Scott’s
    assignment to the new sample receiver job could be deemed an
    “adverse employment action” based on evidence that it subjected her
    to appreciably more dangerous conditions — i.e., greater exposure
    to potentially harmful radiation — than those she faced in her
    previous post.    See Gunten v. Maryland, 
    243 F.3d 858
    , 868 (4th Cir.
    2001) (observing that if change in plaintiff’s job assignment
    “truly had been significant,” such as by exposing her to more
    dangerous conditions, her contention that reassignment constituted
    adverse action “would have merit,” and agreeing “in principle that
    increased exposure to dangerous pathogens could adversely effect
    the terms, condition, or benefits of employment”), overruled on
    31
    other grounds by Burlington N. & Santa Fe Ry. Co. v. White, 
    548 U.S. 53
     (2006).   The relevant inquiry is whether Scott was indeed
    subjected to appreciably more dangerous conditions — not whether
    (as suggested by the district court) she suffered a radiation dose
    beyond those limits established by the federal government and the
    defendants.
    The defendants offer us an alternative ground for affirming
    the summary judgment award in their favor: they contend that Scott
    cannot demonstrate, in support of her prima facie case, that she
    was treated worse than “similarly situated” white employees.       See
    Sterling v. Tenet, 
    416 F.3d 338
    , 345 (4th Cir. 2005) (recognizing
    that, to establish prima facie case, plaintiff must “raise an
    inference of discriminatory intent by showing that she was treated
    worse than similarly situated employees of other races”).          The
    defendants point to the fact, acknowledged by Scott, that three
    white employees in her work group (Robbins, Wainwright, and Healy)
    also worked as sample receivers.       The record does not reflect,
    however,   that   Scott   was   “similarly   situated”   to   Robbins,
    Wainwright, and Healy.    Rather, the evidence shows that Scott was
    the first Site employee ever placed in the sample receiver job
    created to deal exclusively with the highly radioactive BNFL
    samples.   Although Robbins and Wainwright had previously worked
    with the Site’s first set of such samples, they were also handling
    less radioactive samples at the same time. Moreover, when they did
    32
    not apply for the new sample receiver job dedicated to the BNFL
    samples, they (unlike Scott) were not forced into the assignment,
    even though it seems they would have been prime candidates for the
    job having already handled the Site’s first set of BNFL samples.
    Instead, Robbins and Wainwright remained sample receivers working
    only with non-highly radioactive samples.      As for Healy, while it
    is possible that his sample receiver job involved working with the
    BNFL samples (the record is simply unclear on this point), there is
    no evidence before us suggesting that he was involuntarily assigned
    to do so.10
    Although the facts underlying Scott’s hazardous job assignment
    disparate treatment claim could certainly be clearer, the forecast
    evidence is at least sufficient to withstand summary judgment.     We
    therefore vacate the district court’s summary judgment award on
    this particular claim only, and remand for such other and further
    proceedings as may be appropriate.
    3.   Johnson’s hazardous job assignment claim
    10
    Notably, while the defendants assert in this appeal that they
    had a legitimate, nondiscriminatory reason for assigning Scott to
    the new sample receiver job (i.e., a work shortage in her group
    that left her without a full-time assignment), see supra note 7,
    they do not dispute that Scott has forecast sufficient evidence of
    pretext to survive summary judgment. In that regard, Scott relies
    on the evidence reflecting that the defendants have given varying
    reasons for choosing her for the new position, thus creating a
    genuine issue of fact with respect to pretext. See EEOC v. Sears
    Roebuck & Co., 
    243 F.3d 846
    , 852-53 (4th Cir. 2001) (“[T]he fact
    that Sears has offered different justifications at different times
    for its failure to hire Santana is, in and of itself, probative of
    pretext.”).
    33
    Johnson maintains that the district court erred in awarding
    summary judgment to the defendants on her hazardous job assignment
    disparate treatment claim.       Upon reviewing the record, however, we
    are constrained to agree with the district court that Johnson’s
    evidence was wholly insufficient to establish a prima facie case of
    discrimination.     In her own affidavit (apparently submitted to
    clarify   her     vague    and   sometimes     contradictory   deposition
    testimony), Johnson averred only that “I was forced to ‘dress out’
    [for protection from radiation exposure] as often as every day from
    some point in the early 1990’s until I was laid off in May 1995.
    White Painters with my same White Foreman, Eddie Hill, were not
    required to dress out as often as I was.”               Simply put, this
    evidence cannot defeat the defendants’ summary judgment motion.
    See Bryant v. Bell Atl. Md., Inc., 
    288 F.3d 124
    , 134-35 (4th Cir.
    2002) (“These affidavits . . . amount to no more than subjective
    beliefs, and such evidence, without more, is insufficient to create
    a genuine issue of material fact as to any discriminatory conduct
    on Bell Atlantic’s part.”).        Accordingly, we affirm the district
    court’s   summary    judgment    award    on   Johnson’s   hazardous   job
    assignment disparate treatment claim.
    4.    Lott-Abney’s demotion claim
    Finally, Lott-Abney challenges the district court’s grant of
    summary judgment on her demotion-related disparate treatment claim.
    For the reasons discussed by the district court, however, we
    34
    conclude that Lott-Abney failed to establish her prima facie case.
    Cf. Causey v. Balog, 
    162 F.3d 795
    , 802 (4th Cir. 1998) (observing
    that evidence was insufficient to show that employer “filled”
    plaintiff’s position with someone outside protected class, where
    employer split plaintiff’s former duties between two divisions);
    Blistein v. St. John’s College, 
    74 F.3d 1459
    , 1470 (4th Cir. 1996)
    (concluding that plaintiff failed to establish he was “replaced”
    where evidence reflected that alleged replacement assumed “only
    some of [plaintiff’s] former duties,” other such duties were given
    to “various individuals [in plaintiff’s same] protected class,” and
    remaining “duties were not assumed by anyone”).       We therefore
    affirm the district court’s summary judgment award on Lott-Abney’s
    illegal demotion claim.
    IV.
    Pursuant to the foregoing, we affirm the district court with
    respect to the claims of Sherman (No. 04-2414), Lott-Abney (No.
    2417), and Johnson (No. 2418).   We affirm in part on the claims of
    Scott (No. 04-2420); we vacate, however, the award of summary
    judgment on her hazardous job assignment claim, and remand for
    further proceedings on such disparate treatment claim only.
    Nos. 04-2414, 04-2417, and 04-2418 AFFIRMED
    No. 04-2420 AFFIRMED IN PART
    AND VACATED AND REMANDED IN PART
    35