Walter Capaccioli

Hon. Walter P. Capaccioli (Ret.)

JAMS Mediator, Arbitrator, Referee/Special Master, Neutral Evaluator

Case Manager
Melissa Ornstil
T: 415-774-2600
F: 415-982-5287
Two Embarcadero Center, Suite 1500, San Francisco, CA 94111

Walter P. Capaccioli is available to conduct cases virtually. JAMS is equipped to provide virtual ADR services on a variety of online platforms, including Zoom, Microsoft Teams, WebEx, and more.


Hon. Walter P. Capaccioli (Ret.) is known for his ability to arbitrate and successfully mediate complex disputes. During Justice Capaccioli's tenure on the Superior Court bench and his subsequent years as a dispute resolution expert, he has heard virtually every type of civil dispute, including complex matters.

ADR Experience and Qualifications

  • Arbitrated, served as special master, and successfully mediated many hundreds of single and multi-party matters involving bad faith, contract, real estate, professional malpractice, personal injury, property damage, insurance coverage, product liability, wrongful termination, discrimination, sexual harassment, business disputes, hazardous waste clean up, mold and fire damage since joining JAMS in 1993
  • Heard breach of contract, malpractice, condemnation,  and complex soil and ground water contamination clean up lawsuits as a Judge Pro-Tem
  • Heard cases in virtually every area of the law, including contracts, probate, insurance, professional malpractice, personal injury, property, construction defects, and class action suits as a sitting judge
  • Authored opinions on most areas of California law as an appellate justice

Representative Matters

  • Oakland Hills fire
  • Nationwide vanishing premiums life insurance class action
  • Refinery chemical toxic release
  • Securities fraud class actions
  • Former Treasurer of California Judges Foundation
  • Former member, Board of Directors, California Judges Foundation
  • Past President, North San Mateo County Bar Association
  • Former Member and Director of San Mateo County Bar Association
  • Former member, Board of Directors of American Red Cross
  • Former Library Board of Trustees, San Mateo
  • Former City of San Mateo Personnel Board
  • Justice, California Court of Appeal, Sixth Appellate District, 1986-1993
  • Pro-Tem Justice, California Supreme Court, 1985
  • Judge, Superior Court of San Mateo County, 1974-1986
    • Presiding Judge, Juvenile Court, 1982-1983
    • Member, Appellate Department, San Mateo County Superior Court, 1980, 1981, 1984
    • Presiding Judge, 1978
    • Assistant Presiding Judge, 1977
  • San Mateo Municipal Court, 1971-1974
  • Commanding Officer, 22nd Group, Non-Commissioned Officer Academy, 1956
  • L.L.B., Stanford Law School, 1957
  • B.S., University of San Francisco, 1953



Practice Areas

  • Appellate
  • Arbitration
  • Business/Commercial
  • Construction Defect
  • Employment
  • Environmental
  • Insurance
  • Personal Injury/Torts
  • Professional Liability
Available nationwide


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