Member Directory

Mario Choi

Donahue Fitzgerald
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Mario Choi
Donahue Fitzgerald

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, Class Actions, Super Lawyers, 2020-2021

Northern California Super Lawyer Rising Stars, Class Actions, Super Lawyers, 2015-2018

Recent Articles/News

Senior Counsel Mario M. Choi Joins Donahue Fitzgerald

Practice Areas


Intellectual Property

Bar Admissions


New York


U.S. Court of Appeals, 8th Circuit

U.S. Court of Appeals, 9th Circuit

U.S. District Court, Southern District of New York

U.S. District Court, Northern District of California

U.S. District Court, Southern District of California

U.S. District Court, Central District of California

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