Charles J. Mahoney


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Charles Mahoney is an associate in O’Melveny’s New York office and focuses his practice on labor and employment matters. He represents employers from sectors across the economy, including aviation, financial services, sports, technology, and healthcare and pharmaceuticals.

Charles is involved in the pro bono community as well. His practice in this area includes representing military veterans seeking disability benefits and filing an amicus brief on behalf of higher education institutions to protect their DACA students.


Bar Admissions

  • New York

Court Admissions

  • US District Court, Colorado and Southern District of New York


  • Columbia University, J.D., 2016
  • New York University, B.A., English and Economics, 2013
  • Prevailed on summary judgment in nationwide class action on behalf of Alaska Airlines and Horizon Air alleging the airlines violated USERRA by not paying their pilots while on short-term military leaves, and also prevailed on summary judgment as to Plaintiff’s individual claims alleging a pilot-scheduling policy at Horizon violated USERRA. Clarkson v. Alaska Airlines, Inc., 2021 WL 2080199 (E.D. Wash. May 24, 2021).
  • Prevailed on motion to dismiss based on Railway Labor Act preemption on behalf of an airline in a proposed class action brought by a retired flight attendant alleging the airline impermissibly changed her travel privileges. See Wynn v. American Airlines, Inc., 2020 WL 1934994 (E.D. Missouri, April 22, 2020).
  • Obtained Third Circuit order decertifying Rule 23 state wage and hour class action of airline employees. Ferreras v. Am. Airlines, Inc., 946 F.3d 178 (3d Cir. 2019).
  • Obtained summary judgement on all claims in purported class action filed by a pilot against an airline alleging the airline violated USERRA in the manner it provided sick time, vacation time, and operations-based bonuses to pilots who took military leaves of absence from American. Hoefert v. American Airlines, No. 4-18-cv-00466-P, (ECF No. 126) (N.D. Tex. Jan 9, 2020).
  • Represented an airline in litigation against the union representing its mechanics to stop a work slowdown causing flight delays and cancellations and prevailed in obtaining a temporary restraining order, a modified temporary restraining order, and a permanent injunction following a trial on the merits. See Am. Airlines, Inc. v. Transp. Workers Union of Am., AFL-CIO, Case No. 4:19-CV-414-A, 2019 WL 3774501 (N.D. Tex. Aug. 12, 2019).