Marc A. Koonin


Marc A. Koonin

Overview Overview Experience Credentials

Marc Koonin has extensive experience representing both private and public sector employers. His practice includes defending suits alleging wrongful termination, harassment, discrimination, retaliation, wage and hour claims, unfair labor practices, defamation, fraud and various other labor and employment-related claims, as well as defending labor arbitrations and a variety of labor and employment-related complaints brought before various state and federal administrative agencies.

Marc also directs and conducts internal employment investigations regarding alleged misconduct, conducts employment law compliance audits, prepares and reviews employment policies and forms, and advises clients on labor and employment-related matters, including preventing harassment, discrimination, and retaliation claims, wage and hour law, employee leave, accommodating disabled employees, labor relations, union organizing, collective bargaining, avoiding and defending charges relating to unfair labor practices, responding to strikes and picketing, workplace privacy issues, independent contractor status, implementing reductions-in-force, protecting trade secrets and disciplining and terminating employees.

Marc regularly advises employers on workplace safety issues, including obligations under Cal/OSHA and federal OSHA regulations, and has represented a wide variety of employers appealing citations before the Cal/OSHA Appeals Board and the federal Occupational Safety and Health Review Commission.

Immediately prior to joining Sedgwick, Marc worked as an associate in the labor and employment section of a recognized San Francisco law firm. He previously served as an officer in the U.S. Army Judge Advocate General’s Corps, where he defended employment claims brought by federal civilian employees and was also detailed as a Special Assistant U.S. attorney.

Marc is fluent in Mandarin Chinese.


Marc has given numerous presentations sponsored by organizations including Sedgwick, M. Lee Smith Publishers LLC, the Bar Association of San Francisco and the Northern California Human Resources Association, including presenting the FMLA/CFRA Compliance Workshop given as part of BLR’s 7th Annual 2012 California Employment Law Update and presenting at the Northern California Human Resources Association’s HR West Annual Conference & Trade Show in 2010, 2009 and 2007.


Marc has also published articles on employment law in a variety of publications, including Employment Law 360, The Recorder and The Labor Lawyer.




  • California
  • 9th U.S. Circuit Court of Appeals
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court (C.D. Cal.)
  • U.S. District Court (E.D. Cal.)
  • U.S. District Court (N.D. Cal.)
  • U.S. District Court (S.D. Cal.)
  • U.S. Supreme Court


  • J.D. (1993) University of California, Los Angeles School of Law
  • B.A. (1990) University of California at Davis, with honors

Memberships and Affiliations

  • Labor and Employment Section of the California Bar Association
  • California Hotel & Lodging Association Governmental and Legal Affairs Committee
  • Labor & Employment Section of the Barristers Club of San Francisco — past chair (March 2002 – March 2003)