Law Offices of Triano & Byrne
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Mark D. Byrne Esq.

Of Counsel




Mark D. Byrne joined Triano & Byrne in 1992 and currently serves as Of Counsel. He has over 30 years of legal experience, including multiple trials involving fraud, breach of contract, dissolution of partnerships, dissolution of limited liability companies, and piercing of the corporate veil, complex federal commercial litigation, real property litigation, and complex family law matters.

Mark firmly believes in giving back to the community. He currently serves on the St. Joseph's Church of Pinole Pastoral Council, and previously served on the Board of Directors for CASA Contra Costa County, the School Board and Master of Ceremonies for St. Joseph's Elementary School in Pinole, and as the president of the Hercules Rotary Club.

Prior to joining Triano & Byrne, Mark worked as an attorney in various law firms located in San Pablo, San Ramon, and Stockton, California.

Areas Of Practice

  • Business Litigation and Corporate Formation
  • Commercial and Residential Real Property Litigation, including Land Use, Water Law, and Landlord-Tenant Disputes
  • Family Law, including Child Abuse, Domestic Violence, Mental Illness, Complex Tracing, and Spousal and Child Support
  • Bankruptcy and Probate/Trust Litigation

Bar Admissions

  • California, 1983


  • McGeorge School of Law, University of the Pacific, Sacramento, California
    • J.D. - 1983
  • University of California, Riverside, California
    • B.S. - 1980
    • Major: Environmental Sciences

Representative Cases

  • Kaisha v. Dodson, 423 B.R. 888, 2010, N.D. Cal.
  • Gruendl v. Oewel Partnership, Inc., 55 Cal. App. 4th 654, 1997, Trial Counsel
  • Popov v. Hayashi (Baseball case), Cal. Rptr. 2d, 2002 WL 31833731, 2002, Cal. Superior

Pro Bono Activities

  • Hercules Rotary Club, 1986 to Present
  • Hercules Rotary Club, President, 1992 to 1993
  • St. Joseph's Elementary School, Pinole, Master of Ceremonies for Auction, 2002 to Present
  • St. Joseph's Elementary School, Pinole, School Board, 1997 to 2001
  • St Joseph's Church Pinole Pastoral Council, 2000 to 2006
  • Board of Directors, CASA Contra Costa County, 1990 to 1996
  • Legal advice for case workers, CASA Contra Costa County, 1989 to 1994
  • Battered Woman's Alternative (now STAND!), 1984 to 1992


  • Kappa Alpha Order