Ziparo v. CSX Transportation, Inc.

Ziparo v. CSX Transportation, Inc. · United States Court of Appeals for the Second Circuit · November 25, 2025 · No. 23-262

Summary

The Second Circuit addresses Cody Ziparo’s Federal Railroad Safety Act whistleblower-retaliation claims against CSX Transportation. Applying the Supreme Court’s decision in Murray v. UBS Securities, the court holds that an FRSA plaintiff need not prove retaliatory intent, animus, or motive to satisfy the contributing-factor causation standard and overrules contrary aspects of Tompkins v. Metro-North Commuter Railroad Co. The court concludes that disputed factual issues preclude summary judgment on Ziparo’s retaliatory hostile work environment and termination claims, vacates the district court’s judgment, and remands for further proceedings.

Court
United States Court of Appeals for the Second Circuit
Writing for the Court
Sack, Circuit Judge; Nardini, Circuit Judge; Pérez, Circuit Judge
Jurisdiction
United States Court of Appeals for the Second Circuit
Decision date
November 25, 2025
Docket number
23-262
Procedural posture
Plaintiff appealed from the Northern District of New York's grant of summary judgment to CSX in an action under the Federal Railroad Safety Act alleging retaliatory hostile work environment and wrongful termination. The Second Circuit vacated the summary judgment and remanded.
Standard of review
Summary judgment is reviewed de novo. The evidence is construed in the light most favorable to the nonmovant, and the court identifies factual issues rather than resolving them.
Precedential value
Published and precedential Second Circuit opinion
Parties
Cody Ziparo v. CSX Transportation, Inc.
Disposition
vacated

Topics

whistleblowerretaliationemployment lawstatutory interpretationsummary judgment

Practice areas

employment lawwhistleblower retaliationrailroad employment lawappellate procedure

Questions Presented

  1. Whether the FRSA incorporates the AIR-21 burden-shifting framework and contributing-factor causation standard into federal district court actions brought under the statute's kickout provision.
  2. Whether Murray v. UBS Securities, LLC requires the Second Circuit to overrule its prior holdings that an FRSA plaintiff must prove retaliatory intent, animus, or motive and that temporal proximity alone cannot establish causation.
  3. Whether a retaliatory hostile work environment is a cognizable adverse employment action under the FRSA and, if so, what standard governs that claim.
  4. Whether disputed issues of material fact precluded summary judgment on Ziparo's retaliatory hostile work environment and termination claims.

Holdings

  1. The AIR-21 burden-shifting framework and its contributing-factor causation standard apply to FRSA actions filed in federal district court under the kickout provision, 49 U.S.C. § 20109(d)(3).
  2. An FRSA plaintiff need not prove that the employer acted with retaliatory intent, animus, or motive. The plaintiff must show by a preponderance of the evidence that protected activity contributed, alone or with other factors, to the adverse employment action.
  3. Sufficiently close temporal proximity may, by itself, satisfy an FRSA plaintiff's contributing-factor causation burden; no category of evidence is categorically insufficient under the standard.
  4. A retaliatory hostile work environment is a cognizable adverse employment action under the FRSA. The applicable standard is whether the retaliatory actions, considered individually or in the aggregate, might well have dissuaded a reasonable worker from engaging in protected activity.
  5. Summary judgment for CSX was improper because a reasonable jury could find that Ziparo engaged in protected activity before May 2016, experienced a retaliatory hostile work environment, and was terminated in part because of his protected activity; CSX also failed to establish by clear and convincing evidence that it would have terminated him absent that activity.

Key quotations

Instead, an employee must only demonstrate, by a preponderance of the evidence, that their protected activity “contributed” to the employer’s adverse employment action. (35-37)
An FRSA plaintiff can therefore withstand summary judgment on causation so long as they proffer sufficient evidence—direct or circumstantial, including evidence of temporal proximity—from which a reasonable jury could infer that the plaintiff’s protected activity contributed, in any way, to the challenged adverse action. (41-43)
We conclude that a retaliatory hostile work environment is a cognizable adverse employment action under the FRSA. (47-52)
But an employer does not meet this burden merely by proving what it could have done—instead, it must show what it would have done in a counterfactual scenario in which the plaintiff had engaged in no protected activity. (62-64)

Factual background

Ziparo worked as a CSX freight train conductor and was pressured by supervisors to falsify entries in CSX's onboard work-order system. He repeatedly complained that the falsification demands, accompanying scrutiny, and stress created an unsafe working environment. After he made formal complaints, he failed to return a railroad switch to its proper position, and CSX terminated him even though only six of seventeen employees charged with similar violations had been terminated.

Procedural history

Ziparo filed an FRSA complaint with the Department of Labor on August 2, 2016. After the Department of Labor failed to issue a final decision within 210 days, Ziparo filed suit in the Northern District of New York. The district court initially granted summary judgment to CSX because it found no protected activity; the Second Circuit reversed in Ziparo II. On remand, the district court again granted summary judgment, finding insufficient causation and alternatively finding that CSX would have terminated Ziparo absent protected activity. The Second Circuit vacated that judgment and remanded for further proceedings.

Remand instructions

The case is remanded for further proceedings consistent with the opinion. If the case proceeds to trial, the jury must determine whether Ziparo's protected activity contributed to the hostile work environment and termination and, if so, whether CSX proved by clear and convincing evidence that it would have taken the same actions absent the protected activity.

Court Document

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