William Cahill

Hon. William J. Cahill (Ret.)

JAMS Mediator, Arbitrator and Referee/Special Master

Case Manager
Scott Schreiber
T: 415-774-2615
F: 415-982-5287
Two Embarcadero Center, Suite 1500, San Francisco, CA 94111


Judge Cahill has extensive experience resolving complex business and commercial disputes as a mediator and as an arbitrator at JAMS. As a judge in San Francisco Superior Court, Judge Cahill presided over and settlement many business commercial cases. While in private practice, he specialized in complex litigation and construction law representing architects, engineers, owners and contractors, both in litigation and as outside corporate counsel. Recent business commercial disputes resolved by Judge Cahill in California as well as in New York include the following representative matters.

Representative Matters

  • Arbitrated a multi-million dollar contract dispute between real estate developers
  • Mediated a case involving alleged misrepresentation by an internet company on its website to its customers
  • Mediated a dispute over alleged theft of trade secrets regarding prescription drugs
  • Mediated dispute between Bankruptcy Trustee and National Bank over a contract dispute on fees and obligations
  • Mediated dispute between energy supplier and city about utility fees
  • Mediated dispute between national corporations on an issue of breach of fiduciary duty
  • Mediated dispute between two corporations concerning false advertising which allegedly misrepresented a competitor’s product
  • Mediated dispute over cable company’s right to operate in certain geographical areas
  • Mediated dispute over design of windmills erected in the United States and Canada
  • Mediated dispute over responsibility for causes and damages resulting from a fire that destroyed a warehouse and adjacent buildings
  • Mediated real estate dispute over lease terms in a commercial building
  • Special Master in a federal dispute involving venture capitalists’ liability
  • Arbitrated contract dispute related to purchase and sale of steam, water, and hydrogen manufacturing facility and the provision of services between adjacent facilities
  • Mediated commercial dispute between two global companies over the scope of an audit clause in a supply agreement that permits either party to ensure that the other is complying with contractual obligations
  • Mediated business dispute related to investment structure of bridge note purchased from a Chinese company through a global trading firm
Completed Virtual ADR training conducted by the JAMS Institute, the training arm of JAMS.

  • Included on "National Mediators" list, Chambers USA America’s Leading Lawyers for Business, 2017-2022
  • Recognized as a Top California Neutral, Daily Journal, 2004, 2005, 2009-2013
  • Recognized as a Northern California Super Lawyer, ADR Category, San Francisco Magazine, 2004, 2006-2014
  • Recognized as one of the three Best Neutrals in the Bay Area, through an open survey of attorneys, The Recorder, 2007, 2008, and 2009
  • Recognized as one of the “500 Leading Judges in America,” by Lawdragon Magazine, 2006
  • Recognized as one of the Bay Area's Top 10 Mediators and Top 10 Arbitrators, The Recorder, 2002
  • Chosen as the top judge on the San Francisco Superior Court in a poll published in the San Francisco Examiner; Judge Cahill's settlement skills were noted in the December 14, 1998 article
  • Trial Judge of the Year, San Francisco, 1992
  • Lecturer, international, national, and local speaking engagements including topics related to class actions, mediation, employment, arbitration, insurance, construction, ethics, law and motion practice, expert witnesses, and clause drafting, among others
  • Former Member, Chief Justice Ronald George's Committee to revise the California Civil Jury Instructions
  • Judicial Officer, San Francisco Bar Association Bench Bar Media Committee, 1991-2000
  • Former Member, Board of Directors, Association of Business Trial Lawyers, 1996-1998; (In 1994, Judge Cahill was chosen by the ABTL to be an instructor on settlements to both the United States District Court, Northern California and the San Francisco Superior Court benches.)
  • Member, Litigation Section, Bar Association of San Francisco, 2000-present
  • "Reading the Room," ADR Profile, Daily Journal, October 16, 2015
  • Judge, San Francisco County Superior Court, 1991-2000
  • Partner, Bronson, Bronson & McKinnon, 1986-1991
  • J.D., Hastings College of Law, 1979
  • B.S., University of California at Berkeley, 1976

Counsel Comments

    • "As a mediator, Judge Cahill is prepared, diligent, perceptive, and persistent. He devotes his full attention to understanding the dispute, the dynamics of the parties and their counsel, and to reaching a resolution.” 
    • “Judge Cahill is an excellent arbitrator. He can handle matters that are extremely complex and he prepares very thoughtful and careful statements of decision.”




This page is for general information purposes.  JAMS makes no representations or warranties regarding its accuracy or completeness.  Interested persons should conduct their own research regarding information on this website before deciding to use JAMS, including investigation and research of JAMS neutrals. See More