John J. Duffy


Gray•Duffy, LLP

21700 Oxnard Street,
Suite 1950
Woodland Hills, CA 91367






[email protected]



  • Southwestern University School of Law (JD, 1979)
  • University of Notre Dame
    (BS, 1973)

John J. Duffy


John Duffy, co-founder of Gray•Duffy, LLP, has a practice which covers a broad spectrum of civil litigation matters, including insurance, construction defect, education, personal injury and employment law. He has extensive trial and litigation experience, representing clients in more than 50 jury trials, and in hundreds of hearings and arbitrations. Mr. Duffy also serves as a mediator assisting parties in privately resolving their disputes.

Most recently, Mr. Duffy has successfully defended business owners, property owners and individuals in various civil lawsuits in State and Federal Court arising out of serious personal injuries and property damage claims. He routinely represents heavy equipment operators, both as private counsel and as insurance-retained counsel. As a former high school teacher, he also has unique familiarity with education law, having previously represented the Los Angeles Unified School District, as well as numerous private schools.

Mr. Duffy obtained his Juris Doctorate from Southwestern University School of Law in Los Angeles and received his undergraduate degree from the University of Notre Dame, completing a double major in Political Science and Economics. While attending law school, he received practical trial experience with the Los Angeles County District Attorney’s office trying cases. Prior to attending law school, Mr. Duffy served as an officer in the U.S. Army.

A native of New Jersey, Mr. Duffy was previously admitted to practice law in the state. Mr. Duffy has been admitted to practice law in California since 1980. He is also admitted to the United States District Court, Central District of California and the U.S. District Court for the District of New Jersey.

Mr. Duffy has taught Insurance Law at Ventura College of Law and is presently an Adjunct Professor at California Lutheran University, where he teaches Business Law and Ethics in their MBA Program.

Mr. Duffy conducts mediations and arbitrations for the Los Angeles Superior Court, and serves as a Judge Pro Tem in the Los Angeles Superior Court. He regularly participates on industry panels and speaks on subjects including risk management and other insurance litigation topics

Professional Affiliations

  • State Bar of California
  • Los Angeles County Bar Association
  • San Fernando Valley Bar Association
  • Association of Southern California Defense Counsel
  • Claims and Litigation Management Alliance (The CLM)

Community Organizations

  • AYSO Soccer, Region 9, Legal Counsel
  • San Fernando Valley Bar Association Litigation Committee
  • Operation Gratitude

Recognition and Awards

  • AV® Preeminent™ Peer Review Rating by Martindale-Hubbell

Appellate Opinions

  • Mayer Development v. Lee Bovin Associates

Legal Writings, Articles and Publications

  • Article: “The Changing World of Indemnification in California” Published: Construction Contracts Law Report February 2013
  • Article: “Beware The Doctrine of Superior Equities” Published: Law 360 March 2011

21700 Oxnard Street, Suite 1950
Woodland Hills, CA 91367

555 Twin Dolphin Drive, Suite 330
Redwood City, CA 94065

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