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John M. O'Brien - Principal Attorney

Mr. O’Brien is recognized throughout the California legal community as a zealous and effective advocate for individuals who have been catastrophically injured.

Since its inception in 1996, his firm, John M. O’Brien & Associates, P.C., has obtained a number of multi million-dollar jury verdicts and settlements in a wide variety of personal injury cases.

Therefore Mr. O'Brien enjoys an excellent reputation for aggressive advocacy and integrity.

Born August 20, 1965. Admitted to the California State Bar in 1990, U.S. District Court, Eastern and Northern Districts of California and U.S. Court of Appeals, Ninth Circuit.


  • University of Southern California Center (J.D., Honors, 1990)
  • University of the Pacific (B.A., Honors, Magna Cum Laude, Political Science/Economics, 1987)


Areas of Practice

  • Catastrophic Injuries
  • Truck Accidents
  • All Types of Accidents
  • Product Liability
  • Nursing Home Abuse
  • Wrongful Death

Bar Admissions


John O'Brien's Experience


Brobeck, Phleger & Harrison
Associate, 1990 - 1996

"My time at Brobeck, Phleger & Harrison provided me with a unique perspective on how a big company defends itself against personal injury lawsuits. My training there has proven to be an invaluable asset in my work as a plaintiffs' personal injury attorney." - John M. O'Brien


John M. O'Brien & Associates, P.C.
Owner, 1996 - present

"We pride ourselves in seeking justice for every client who has been injured as a result of another's negligent act. We don't rest until each and every client has been fully compensated for their injuries." - John M. O'Brien


Achievements & Awards


ABOTA - Member of American Board of Trial Advocates
Mr. O'Brien has been selected for membership in ABOTA in 2008. ABOTA is a select group of trial lawyers whose admission requires at least 20 successful jury trials and acknowledgement of demonstrated stability and court room skill. 


A+ BBB Rating
Attorney John M. O'Brien and his law firm John M. O'Brien & Associates has an A+ rating on BBB - Better Business Bureau.
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AV rated by Martindale-Hubbell Law Directory
John M. O'Brien achieved Martindale Hubbell's highest rating - AV Preeminent rating. The Martindale-Hubbell® Peer Review Ratings™ are an indicator of a lawyer's ethical standards as well as professional ability.
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Personal injury lawyer John M. O'Brien is listed on

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Lead Counsel Rating
Personal injury lawyer John M. O'Brien is now Lead Counsel rated.

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Lawyer Central
John M. O'Brien is a featured lawyer on Lawyer Central.
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CCTLA Award - Capital City Trial Lawyers Association
In 2009, the Capital City Trial Lawyers Association (CCTLA) awarded John M. O'Brien with the distinction and honor of Advocate of the Year.


Superb Avvo Rating
John M. O'Brien is Avvo-rated 10.0 Superb. In 2014 John M. O'Brien received the Top Contributor title from Avvo.
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"John M. O'Brien is the kind of lawyer who cares about his clients and works tirelessly to see that justice is served. He settled my auto case for $750.000."

Beth N.,Client

"Mr. O'Brien is a great trial lawyer who never stops fighting. He tried my wife's wrongful death case and the jury awarded us $2.5 million."

Sergio M., Client

"I needed justice in my case and after looking for an attorney, I came across John M. O’Brien. All I can say is that he treated me with utmost respect during this difficult moment in my life."

J Richard, Client

"You cannot go wrong asking John O’Brien to handle your injury case no matter where it occurs in the state of California. He is definitively one of the best – if not the very best injury attorney in the entire state."

R Hunter, Client


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How can John M. O'Brien Help You?


John M. O'Brien is a highly skilled and experienced attorney who has handled successfully over the years many cases involving personal injuries. He represents victims who sustain severe injuries due to negligence, and he understands how devastating these injuries can be, not only for the victim but also the victim's loved ones. If you were injured because of someone else's negligence, or you lost someone close to you John M. O'Brien & Associates, P.C. can help.

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