Robert Siegel


Thank you for your interest. Before you communicate with one of our attorneys, please note: Any comments our attorneys share with you are general information and not legal advice. No attorney-client relationship will exist between you or your business and O’Melveny or any of its attorneys unless conflicts have been cleared, our management has given its approval, and an engagement letter has been signed. Meanwhile, you agree: we have no duty to advise you or provide you with legal assistance; you will not divulge any confidences or send any confidential or sensitive information to our attorneys (we are not in a position to keep it confidential and might be required to convey it to our clients); and, you may not use this contact to attempt to disqualify O’Melveny from representing other clients adverse to you or your business. By clicking "accept" you acknowledge receipt and agree to all of the terms of this paragraph and our Disclaimer.


Bob Siegel, a former Chair of O’Melveny’s Litigation Department and Vice-Chair of the Firm, is a labor lawyer who focuses his practice on representing major companies in federal court litigation under the Railway Labor Act and the National Labor Relations Act, arbitrations, labor negotiations, National Mediation Board and National Labor Relations Board matters, and employment law litigation and counseling. Representative past and current clients include: American Airlines Group, United Airlines, Delta Air Lines, Alaska Air, Astar Air Cargo, AirTran Airways, Pan American World Airways, America West Airlines, Midwest Airlines, Spirit Airlines, Northwest Airlines, AMR Eagle, Atlas Air, Flying Tigers, Federal Express, Pacific Southwest Airlines, Polar Air, Delphi Corporation, and Mylan Laboratories.

Bob has also been labor counsel to several airlines regarding mergers, asset acquisitions, and ESOP transactions. Bob is a past Co-Chairman of the American Bar Association’s Railway and Airline Labor Law Committee, and is a Senior Editor of The Railway Labor Act (BNA).


Honors & Awards

  • Selected for inclusion in Super Lawyers Business Edition (2015)
  • Named an Employment MVP by Law360 (2012-2013)
  • Recognized by The Best Lawyers in America for his work in the practice area of Employment Law - Management (2013-2015)
  • Selected by the Daily Journal as a Top Labor & Employment Lawyer (2010-2012, 2014-2015)
  • Ranked by Chambers USA (2007-2015)
  • Named one of “The Nation’s Most Powerful Employment Attorneys” by Lawdragon (2011-2016)
  • Named a Southern California Super Lawyer (2008-2015)
  • “Highly Recommended” lawyer in Dispute Resolution and Arbitration by PLC Which Lawyer? (2010)
  • Recognized in Legal 500 for Labor and Employment: Labor-management Relations (2013)
  • Selected as “Dealmaker in the Spotlight” by The American Lawyer (2013)


Bar Admissions

  • California
  • District of Columbia
  • New York


  • University of Michigan, J.D.: magna cum laude; Order of the Coif
  • University of California at Berkeley, B.A.: with great distinction; Phi Beta Kappa

Professional Activities


  • American Bar Association, Litigation and Labor and Employment Law Sections
  • Governing Board, The College of Labor and Employment Lawyers, Inc.
  • Past Co-Chairman, American Bar Association, Railway and Airline Labor Law Committee


  • Senior Editor, The Railway Labor Act (BNA)


  • The American Arbitration Association
  • Practicing Law Institute


  • “Modernization for Aviation and Railway Industries,” Employment Law360, co-authored with Natasha Waglow and Sloane Giddon (February 2012)


  • “Election Campaigns,” "Management and the Mediation Process and Emergency Boards,” “Judicial Enforcement of the Railway Labor Act and ‘ULP’s’: Is There ‘Protected Activity’ under the RLA?,” “Affiliations, Mergers, and Consolidations,” The American Law Institute’s Airline and Railroad Labor and Employment Law: A Comprehensive Analysis (October 2012)
  • Flight Attendants in Reunion v. American Airlines, Inc., No. 15-869 (2d Cir. 2016) – Represented American Airlines in the Second Circuit Court of Appeals decision finding that American Airlines had integrated the airline seniority lists of American Airlines and US Airways flight attendants in a fair and equitable manner under the McCaskill-Bond amendment to the Federal Aviation Act
  • Transport Workers Local 591 v. American Airlines, Inc., 2015 WL 3852958 (N.D. Ill. 2015) – Won full dismissal for American Airlines in an action brought by a local union representing American's mechanics on the ground that plaintiffs’ claims were "minor disputes" under the Railway Labor Act and could therefore be remedied through the parties’ collective bargaining agreement's grievance and arbitration procedures
  • Joseph Brown, et al v. United Airlines Inc. and Ben Mitchell v. US Airways Inc., 720 F.3d 60 (1st Cir. 2013) – Represented US Airways, Inc. in the First Circuit Court of Appeals decision surrounding an alleged nationwide class action claim by United Airlines Inc. and US Airways skycaps
  • US Airlines Pilots Association v. US Airways, Inc.– 2012 WL 909834 (E.D. NY 2012) – Successfully represented US Airways, Inc. on a motion to dismiss a lawsuit alleging interference with collective bargaining rights, failure to maintain the "status quo," bad faith bargaining, and failure to exert every reasonable effort to settle disputes
  • Air Transport Ass’n of America, Inc. v. National Mediation Bd., 663 F.3d 476 (D.C. Cir. 2011) – Represented the Air Transport Association of America, Inc., the principal airline industry trade group, in challenging the National Mediation Board’s new voting rules under the Railway Labor Act and the Administrative Procedures Act