Olson Grimsley hero

We founded Olson Grimsley Kawanabe Hinchcliff & Murray to hold the powerful to account. Our mission is to advance the public interest through groundbreaking litigation that tackles the biggest issues of the day while maintaining an unwavering commitment to integrity, quality, creativity, teamwork, and professionalism.

Where our partners have tried cases

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Our team brings over 100 years of experience in private practice and public service, on both the plaintiff and defense side, representing clients in some of the most significant civil rights, antitrust, mass tort, consumer rights, and intellectual property matters of the past 20 years. Our team members have:

  • tried civil and criminal cases to judgment in 15 states;

  • argued 19 cases in the U.S. Supreme Court, the Colorado Supreme Court, the US Courts of Appeals, and state courts of appeals;

  • recovered over two billion dollars for our clients;

  • served as Solicitor General for the State of Colorado securing landmark settlements with the opioid industry and the Catholic Church;

  • served as one of the lead investigators for the BP Oil Spill Commission’s investigation into the root cause of the Deepwater Horizon disaster;

  • led the Colorado Attorney General’s consumer fraud unit returning millions of dollars to Colorado consumers;

  • served as General Counsel of a billion-dollar startup in Denver and the National Asian Pacific American Bar Association in D.C.;

  • served as an Assistant Federal Public Defender representing indigent criminal defendants in Washington, D.C.;

  • clerked for three U.S. Supreme Court Justices, four U.S. Court of Appeals judges, three U.S. District Court judges, and two Colorado Supreme Court Justices; and

  • served on the Boards of Colorado State University System, Colorado Legal Services, Asian Americans Advancing Justice – D.C., Colorado Lawyers Committee, Legal Aid Foundation of Colorado, the Heyburn Initiative for Excellence in the Federal Judiciary, and Minds Matter Colorado.

Our lawyers have also received widespread recognition for their exceptional work:

  • three of our lawyers are Fellows in the American College of Trial Lawyers;

  • one of our lawyers is a member of the American Law Institute, and another has been inducted into the International Society of Barristers;

  • multiple team members have been recognized by Chambers USA, Benchmark Litigation, Lawdragon, and numerous other publications; and

  • three of our lawyers have received public service awards from the Attorney General of Colorado, including Case of the Year, Mentor of the Year, DEI Champion of the Year, Leader of the Year, and the Attorney General’s Award for Exceptional Performance.

We now join forces to focus our experience on advocating for plaintiffs in their most consequential trials and appeals nationwide.

  • “I have entrusted Sean, Jason and Abby with our company’s most important litigation matters. They are remarkable lawyers, bringing a thoughtful, creative, and pragmatic approach to everything they do. They fight tenaciously for their clients while always advocating for what is right. I can’t recommend them enough.”

    —Quinn Johnson, Vice President Deputy General Counsel at Arconic

  • “Sean is a truly outstanding lawyer. As a leading investigative attorney on the Presidential Commission investigating the root causes of the 2010 BP Deepwater Horizon oil spill, Sean combined all the brilliance of a former Supreme Court clerk with the unbending tenacity of the best of trial lawyers.”

    —Richard Lazarus, Professor of Law at Harvard University

  • “Eric is wicked smart. He pairs his unmatched intelligence with an eye toward the strategy and practicalities of a case almost everyone else misses; he wins cases in ways the other side never sees coming. It’s why Eric was my first call for any concern when I was in-house, and why he has often been my first call in private practice.”

    —Rachael D. Lamkin, Partner at Baker Botts LLP, former GC of Otterbox

  • “Kenzo is one of the best trial lawyers and an even better person. He deftly put me on the stand before a federal jury, and I trust his judgment completely. I am astounded as to how he makes time to improve the community in so many ways. If I need legal advice or am asked for a referral, Kenzo is at the top of my list.”

    —Jason Mendelson, Co-Founder of Foundry VC

Contact

Feel free to contact us with any questions.

303-535-9151

Careers

Olson Grimsley welcomes applications from exceptional candidates who recently graduated from law school or finished a clerkship and are dedicated to improving our community through plaintiff-side and public interest impact litigation. Inquiries may be directed to careers@olsongrimsley.com. Olson Grimsley is an Equal Opportunity Employer.