William Horsey



William Horsey is a partner in the San Francisco office of Lewis Brisbois and a member of the General Liability Practice.

Mr. Horsey has been practicing civil defense, including medical malpractice defense, since 1988. He is very experienced in all aspects of civil litigation including trials and binding arbitrations.

Primary Area(s) of Practice

  • General Liability
  • Products Liability

Additional Experience




Association of Defense Counsel

Professional Presentations

  • BaySEC Conference Developments in Financial Regulatory Matters, February 2020
  • California District Attorney's Association Presentation on How to Take An Expert Deposition, May 2019


University of San Francisco School of Law

Juris Doctor, 1988

University of the Pacific

Bachelor of Arts, English and Economics, 1984

Prior Experience

  • Diehl, Steinheimer, Riggio, Haydel and Mordaunt, Stockton, CA 1988-1994
  • Langley, Lamberto, Kreger and Moher, Los Altos, CA 1994-1996
  • St. Paul Staff Legal, San Francisco, 1996-2002
  • Rogaski, Preovolos, Weber & Patterson, LLP, Vallejo, CA 2002-2009
  • Zurich Staff Legal, San Francisco, CA 2009-2011