David J. McMahon

David McMahon is the Managing Partner in Barger & Wolen LLP’s San Francisco office. His practice focuses on large complex litigation. He has worked on numerous high-profile litigation matters involving life settlements, multi-million dollar insurance coverage disputes relating to intellectual property matters, wage and hour litigation, rescission cases, environmental claims, directors and officers liability insurance, maritime matters, and cases involving alleged insurer bad faith.

His expertise also includes international marine transactional work with experience in negotiating shipbuilding contracts. He also has experience in appellate litigation, reinsurance litigation and counseling clients on attorney fee disputes and ethical issues relating to the practice of law.

Mr. McMahon has extensive experience in matters relating to computer-related discovery, large case document management, and the efficient use of technology to streamline the handling of large cases.

He is a co-editor of the firm’s Litigation Management & Attorney Fee Analysis blog, and a California State Chair for the Council on Litigation Management.


  • Golden Gate University, J.D., with highest honors, 1985
  • University of Rhode Island, M.S. 1982
  • University of Rhode Island, B.S., 1979

Articles & Publications

  • Vessel Financing: California Law and The Ship Mortgage Act as Recodified, 2 U.S.F. Maritime Law Journal 1 (1998)
  • An Analysis of In re Mexico City Aircrash, 708 F.2d 4000 (9th Cir. 1983), Ninth Circuit Survey, 14 Golden Gate U.L. Rev. 161 (1984)
  • Procedures for Conducting Scientific Research in Foreign Waters, 8 Marine Affairs Journal 150 (1983)

Professional Memberships

  • The State Bar of California
  • New York State Bar Association
  • Hawaii State Bar Association
  • California Bar Association (Section on Environmental Law and Practice)
Our Reputation Was Earned By Doing Difficult Things Well