Mario M. Choi Partner (510) 451-3300 Download vCard LinkedIn

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Mario joined the Firm in 2021 and focuses his practice on complex commercial litigation matters. He counsels and represents individuals and companies across a wide range of industries through all phases of the litigation process.

Before joining the firm, Mario was an attorney at a plaintiff-side law firm, representing individuals, companies, and public pension funds on a variety of class action matters. Mario began his legal career in New York, first serving as a law clerk to a Justice of the New York Supreme Court, and then as a litigation associate at a New York-based law firm.

Outside the office, Mario is an active member of the community. Mario serves as a Judge Pro Tem for the San Francisco Superior Court and is a lecturer at U.C. Berkeley School of Law. Mario also serves – or has served – on the boards and committees of several non-profit and legal organizations. For his work, Mario was elected a Fellow of the American Bar Foundation.

Professional & Community Affiliations

  • Judge Pro Tem, Superior Court of California, County of San Francisco, 2018-present
  • Lecturer, U.C. Berkeley School of Law, 2021-present
  • Chair, LGBTQ+ Law Section, Federal Bar Association, 2022-present
  • Vice Chair, LGBTQ+ Law Section, Federal Bar Association, 2021-2022
  • Membership Chair, LGBTQ+ Law Section, Federal Bar Association, 2019-present
  • Co-Chair, Minority Bar Coalition, 2023-present
  • Executive Committee, Trial Section, Alameda County Bar Association, 2021-present
  • Board of Directors, Alameda County Bar Association, present
  • Member, Facilities Safety and Maintenance Oversight Committee, Berkeley Unified School District, 2021-present
  • Member, California Lawyers Association
  • Member, American Bar Association
  • Member, Asian American Bar Association of the Greater Bay Area
  • Member, Bay Area Lawyers for Individual Freedom
  • Board of Directors, Bay Area Lawyers for Individual Freedom, 2012-2018
  • Board of Directors, San Francisco Community Health Center, 2012-2018, 2019-2022
  • President, San Francisco Community Health Center, 2019-2022
  • Treasurer, San Francisco Community Health Center, 2013-2018
  • Board of Directors, Wah Mei School, 2015-2021
  • Commissioner, Alameda County Consumer Affairs Commission, 2020-2022


  • Life Fellow, American Bar Foundation
  • Fellow, Litigation Counsel of America
  • Northern California Super Lawyer, Super Lawyers, 2020-2023
  • Northern California Super Lawyer, Rising Stars, Class Actions, Super Lawyers, 2015-2018