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John M. O'Brien

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 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

  • Personal Injury
  • Types of Accidents
  • Product Liability
  • Nursing Home Abuse
  • Dangerous Drugs
  • Wrongful Death

Bar Admissions


John O'Brien's Experience


Brobeck, Phleger & Harrison
Associate, 1990 - 1996

"Working at Brobeck, Phleger & Harrison was a real challenge. I am grateful for everything I learned there." - John M. O'Brien


John M. Obrien & Associates
Owner, 1996 - present

"Having my own law firm is a dream come true. I aim to keep my clients' trust and serve them the best I can" - John M. O'Brien


Achievements & Awards


ABOTA - Advocate of the Year
Attorney John M. O'Brien was named by the American Board of Trial Lawyers advocate of the year 2014.


A+ BBB Rating
Attorney John M. O'Brien and his law firm John M. O'Brien and 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 the Martindale Hubbell 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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Lawyer Central
John M. O'Brien is a featured lawyer on Lawyer Central.
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In 2009, the 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 a 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 injury law. He represented victims who sustained severe injuries due to several accident types and he is well aware how traumatizing these events can be. If you were the victim of someone else's negligence and got injured, or if you lost someone close to you John M. O'Brien can help.

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