Elk Grove - Sacramento Injury Attorney John M. O'Brien

Decorated Personal Injury Lawyer

Not all personal injury attorneys in Sacramento County have the track record and reputation of John O’Brien. From AVVO to Martindale Hubbell, Mr. O’Brien has proven he is a trial-tested injury litigation attorney. His reputation in Sacramento County is stellar, and he gives back to his community. You can catch John donating his time to local schools, investing in charity events, and providing help to those who need it most.



John M. O’Brien founded the Elk Grove-based firm, the O’Brien & Zehnder Law Firm, in 1996, practicing personal injury. He is recognized throughout the California legal community as a zealous and effective advocate for individuals who have been catastrophically injured. Mr. O’Brien has an excellent reputation for aggressive advocacy and integrity, which has helped him obtain numerous multi-million dollar jury verdicts and settlements across a wide array of personal injury cases.

Mr. O’Brien graduated Magna Cum Laude from the University of the Pacific in 1987, receiving his Bachelor’s degree with Honors in Political Science and Economics. He then went on to earn his Juris Doctor with Honors from the University of Southern California in 1990. In addition to being admitted to practice in all California courts and in the United States Court for the Northern and Eastern districts of California, Mr. O’Brien has also been admitted to practice in the Ninth Circuit Court of Appeals.

Additionally, Mr. O’Brien is an active member of several professional organizations including the American Board of Trial Advocates, the American Association for Justice, the Capitol City Trial Lawyers Association, and the Consumer Attorneys of California.


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

Bar Admissions

  • California State Bar
  • Sacramento County Bar Association
  • U.S. District Court, Eastern District of California
  • U.S. District Court, Northern District of California
  • U.S. Court of Appeals, Ninth Circuit

Awards & Memberships

  • University of Southern California Law Review
  • American Board of Trial Advocates (ABOTA)
  • American Association of Justice (AAJ)
  • Capitol City Trial Lawyers Association (CCTLA)
  • Consumer Attorneys of California (CAOC)
  • Lawinfo
  • HG.org
  • Nolo
  • Lawguru
  • Lawyers
  • Findlaw
  • MyLawsuit
  • LawyerLegion
  • Justia


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

The O’Brien & Zehnder Law Firm – Owner, Founding Partner Attorney, 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

Decorated Sacramento Injury Lawyer

John O’Brien is a decorated Sacramento Injury Lawyer. From AVVO to Super Lawyers, Mr. O’Brien has been recognized for over two decades as an aggressive and tenacious injury litigator. John has the tenure, track record, and toughness to take ANY injury case the distance. Big insurance firms and high powered corporate lawyers don’t detour Mr. O’Brien from tackling your injury case. John isn’t afraid of anyone or anything.

Whether you’re facing a major accident injury claim or you are mourning the loss of a loved one – We are here to help

John O’Brien is a seasoned Sacramento Personal Injury Attorney. If you have questions about a car or commercial trucking accident claim, or if you have any injury-related concerns, click the button below to learn more about John and his history as an injury attorney in Sacramento.

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