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.

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

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


  • State Bar Admissions
    • California
  • United States District Courts
    • United States District Court for the Central District of California
    • United States District Court for the Northern District of California
  • United States Courts of Appeals
    • United States Court of Appeals for the Ninth Circuit




Association of Defense Counsel


University of San Francisco School of Law

Juris Doctor, 1988

University of the Pacific

Bachelor of Arts, English and Economics, 1984

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