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Greg David Derin, Esq. brings nearly 20 years of mediation experience to Signature Resolution. Mr. Derin resolves business/commercial contracts, entertainment, intellectual property and trade secrets disputes.


Mari Ventura


Greg David Derin, Esq. brings more than 40 years in the legal industry to his practice at Signature Resolution as a mediator and arbitrator. For nearly 20 years, Mr. Derin has successfully assisted parties in resolving more than a thousand complex matters. He is often called upon to resolve disputes after previous attempts have failed. In his role at Signature, he continues to concentrate on matters involving contract, fraud, entertainment, intellectual property (copyright, trademark, idea submission), trade secret, right of publicity, unfair business practices, employment, class actions, partnership, real estate and legal malpractice.

He is experienced in all phases of litigation and has handled matters before federal and state trial or appellate courts in California, New York, Illinois, Pennsylvania and other jurisdictions. He has appeared before the California Labor Commissioner, the tribunals of the Screen Actors Guild, American Federation of Television and Radio Artists, Directors Guild of America, Writers Guild of America, Major League Baseball Players Association, California Regional Water Quality Control Board, California State Water Resources Control Board and the National Association of Securities Dealers. Mr. Derin has tried cases as varied as a four-month construction defect case, talent agency disputes, and a Los Angeles Superior Court class action.

Mr. Derin is a member of the dispute resolution sections of the Beverly Hills, Los Angeles County and American Bar Associations, the Sports Lawyers Association and the Federal Bar Association. He is a past chair of the California State Bar Standing Committee on Alternative Dispute Resolution. For a full list of Mr. Derin’s achievements, awards & memberships, please see the “Achievements, Awards & Memberships” section below.

Twice each year for eight years, Mr. Derin assisted mediation pioneer Harvard Law School Professor Frank E.A. Sander, and Washington, D.C. mediators Linda Singer and Michael Lewis in teaching the prestigious Mediation Workshop at the Harvard Negotiation Institute.

Parties consistently attribute their successful resolutions to Mr. Derin’s persistence, creative solutions and his deep substantive knowledge and experience.


  • Judicate West, Mediator and Arbitrator (2014 – 2019)
  • gdd Mediation and Arbitration, Mediator and Arbitrator (2002 – 2014)
  • Greg David Derin, Attorney at Law (1997 – 2002)
  • Del, Rubel, Shaw, Mason & Derin, Founding Partner (1989 – 1997)
  • Dern, Mason & Floum, Associate/Partner/Litigation Managing Partner (1979 – 1989)


  • J.D., University of California, Berkeley School of Law, California Law Review, Research and Book Review Editor
  • A.B., University of California, Berkeley, Phi Beta Kappa


  • Southern California SuperLawyer (2006 – 2021)
  • Best Lawyers in America, Best Lawyers in Los Angeles for Mediation (2021)
  • “Power Mediator,” The Hollywood Reporter
  • AV rating, Martindale-Hubbell Law Directory
  • Distinguished Fellow, International Academy of Mediators
  • Fellow, Chartered Institute of Arbitrators (FCIArb)
  • Member, CPR Panel of Distinguished Neutrals (Entertainment and Employment Panels)
  • Member, World Intellectual Property Organization (WIPO) Mediation and Arbitration Panels
  • Member, Panel of Neutrals, London Court of International Arbitration
  • Member, Los Angeles Copyright Society
  • Member, Copyright Society of the USA, Los Angeles Chapter
  • Member, Los Angeles Intellectual Property Law Association


Mari Ventura