Katherine Mayer Mangan

Contact: 858.397.6234
Law School: Georgetown University
Jurisdictions: California
9th Circuit


Directory Practice Areas
  • Appeals & Appellate
Jurisdictions Admitted to Practice
9th Circuit
Professional Experience
Litigation Associate, Latham & Watkins LLP
Litigation Associate, specializing in appellate, municipal, and labor/employment law. Drafted numerous motionsand briefs, including three successful demurrers in litigation valued at over $300 million and a successful motion for summary adjudication eliminating multi-million dollar punitive damage claim. Argued motions, including one that resulted in obtaining over $4 million in attorneys’ fees. Participated in settlement negotiations. Took and defended depositions. Briefed and argued Ninth Circuit appeal. Member of two trial teams. Served on Associates Committee.
Founder & Director, Appellate Litigation Clinic, UNIVERSITY OF SAN DIEGO SCHOOL OF LAW
Founded appellate litigation clinic, which handles pro bono appeals in the Ninth Circuit. Taught seminar on appellate advocacy and supervise law students as they litigate appeals.
Trial Attorney, Attorney General's Honors Program, United States Department of Justice
Investigated and filed civil enforcement actions under pollution control statutes. Negotiated settlements and drafted briefs.
Law Clerk, United States Court of Appeals for the Ninth Circuit
Legislative Aide, United State Senate, Office of Senator Jeff Bingaman
Advised Senator Bingaman on domestic social issues and housing and urban development policy.
Georgetown UniversityJ.D.
Honors: Magna cum laude; Order of the Coif; Top 1% of Class
Activities: Georgetown Law Journal, Executive Editor of Criminal Procedure Project; Institute for Public Representation: Environmental Litigation
Pomona CollegeB.A.
Honors: Summa Cum Laude, Phi Beta Kappa
Activities: Varsity Swimming
Professional Activities
Chair Appellate Court Committee, San Diego County Bar Association 2011-Current
Top Young Attorneys, San Diego Daily Transcript
Women Who Mean Business Finalist, San Diego Business Journal
Wiley Manual Certificate for Pro Bono Services, State Bar of California
Wiley Manual Certificate for Pro Bono Services, State Bar of California
Top Young Attorneys, San Diego Daily Transcript


Articles & Publications
  • Making the Record: Appellate Hints for Trial Lawyers
    ABTL of San Diego


Website: Website



Mayer Mangan, PLC
10755 Scripps Poway Parkway
Suite 367
San Diego, CA 92131
Telephone: 858.397.6234