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

Download Bio

Mario Choi joined Donahue Fitzgerald in 2021 and currently focuses his practice on complex commercial litigation matters, counseling and representing clients through all phases of the litigation process.

Prior to joining the firm, Mario was an attorney at a plaintiff-side law firm, representing individuals, companies, and public pension funds on a variety of securities, antitrust, consumer protection, and privacy class actions. 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 of several non-profit and legal organizations, including the San Francisco Community Health Center, the Bay Area Lawyers for Individual Freedom, and Wah Mei School. For his work, Mario was elected a Fellow of the American Bar Foundation.

Mario is a graduate of Northeastern University School of Law, Columbia University, and Boston University.

Professional & Community Affiliations

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


  • Life Fellow, American Bar Foundation
  • Northern California Super Lawyer, Civil Litigation Defense, Super Lawyers, 2022
  • Northern California Super Lawyer, Class Actions, Super Lawyers, 2020-2021
  • Northern California Super Lawyer Rising Stars, Class Actions, Super Lawyers, 2015-2018