Based in Marin County, CA, Peter James Chambers proudly defends his clients against their government. Mr. Chambers is at the vanguard of criminal defense law, regularly leveraging the latest legal and technological tools to improve his clients' situation. With an unblemished trial record, Mr. Chambers takes equal pride in the number of cases dismissed before ever reaching the jury.

Before swapping coasts and counsel tables, Mr. Chambers served as an Assistant District Attorney at the Kings County District Attorney's Office in Brooklyn, NY, prosecuting cases from attempted murder to petty theft. He is a graduate of Brooklyn Law School, where he was a member of the Moot Court Honor Society, the Journal of Law & Policy, and worked as research assistant for the preeminent New York evidence treatise, Prince, Richardson on Evidence, and Oberlin College, where he was a Dannenberg Scholar. Also, Mr. Chambers completed non-degree legal coursework at Harvard University.

Mr. Chambers is on the Board of Directors of the Fairfax-San Anselmo Children's Center, where he helps support low-income families receive essential child care. He lives in Marin with his partner Julia, a fair housing attorney, and his son Otis, a kindergatener.


Brooklyn Law School

Harvard University
Non-Degree Studies

Oberlin College

Professional Associations

  • Marin County Alternate Defense Panel
  • California Attorneys for Criminal Justice
  • California Public Defenders Association
  • California DUI Lawyers Association

Bar Admissions

  • California

Recent Blog Posts


  • Highly Experienced

    Peter Chambers is a professional, highly experienced attorney. He was my adversary on several cases, and he was always a pleasure to work with yet a tireless advocate for his side.
  • Top Notch

    Peter Chambers is a top notch criminal defense lawyer. His experience working for a time as a prosecutor provides a unique vantage point that gives him the upper hand in fighting for his clients who are facing prosecution. I had the honor of working with him on one case where his skills as a fier...
  • Highly Recommend

    The DA was charging me with a maxmium sentence. Peter understands how both sides of the law work to his clients advantage. He saw the discrepancies in my case and after 2 months he was able to reduce all my charges almost completely upon completion of a small fine and community service. I would h...
  • Thank You

    Peter - Thank you for all the hand holding and making it all as painless and as easy as you did. I hope to never require your services again and if I do find myself in need I will absolutely call you and I will not hesitate to refer you to anyone else that might need your services.