David E. Mastagni

David E. Mastagni


Mastagni Holstedt A Professional Corporation

Recognized since 2023

Sacramento, California

Practice Areas

Labor Law - Union

Litigation - Labor and Employment

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David Emilio Mastagni is a partner with the law firm of Mastagni Holstedt, APC, who focuses on representing public employee unions and their members. His labor and employment law practice includes administrative hearings, pension litigation, writs of mandamus, class actions, and appeals. He is admitted to practice in California, the U.S. District Courts of Southern, Eastern, Northern and Central Districts of California, the 9th Circuit Court of Appeals and the U.S. Supreme Court.

David's public safety clients primarily consist of law enforcement, fire fighters and public attorneys. He is an experienced panel attorney for the Peace Officers' Research Association of California (PORAC) Legal Defense Fund and frequently lectures on the CPRA, police reforms, Constitutional rights, collective bargaining, the FLSA, and public employee discipline. He provides legal analysis and testimony on behalf of his law enforcement and fire fighter clients at the California legislature on bills affecting public safety employees.

Since graduating from U.C. Berkeley School of Law in 1999, David has attained the highest Peer Review Rating of AV Preeminent by Martindale-Hubbell and was named to Super Lawyers Northern California Rising Stars from 2011-2014 and to Super Lawyers Northern California every year since 2015. He has been named to Top Attorneys in Sacramento by Sacramento Magazine since 2015.*AV Preeminent and BV Distinguished are certification marks of Reed Elsevier Properties Inc., used in accordance with the Martindale-Hubbell certification procedures, standards and policies. Martindale-Hubbell is the facilitator of a peer review rating process. Ratings reflect the confidential opinions of members of the Bar and the judiciary. Martindale-Hubbell ratings fall into two categories - legal ability and general ethical standards.

Location
  • 1912 I Street
    Sacramento, CA 95811
Education
  • University of California Berkeley, J.D., graduated 1999
  • University of California Davis, B.A., graduated 1996
Bar Admissions
  • United States, American Bar Associtation
  • California, State Bar of California
  • California, Sacramento County Bar Association
Affiliations
  • AFL-CIO Lawyers Coordinating Committee - Member
  • American Association for Justice - Member
  • American Bar Association, Section of Labor and Employment Law - Member
  • California Employment Lawyers Association - Member
  • Labor and Employment Law Section of the State Bar of California - Member
  • Sacramento County Bar Association - Member
Court Admissions
  • United States Supreme Court
  • Ninth Circuit Court of Appeals
  • All California United States District Courts
  • California Supreme Court

Recognized in The Best Lawyers in America® 2025 for work in:
  • Labor Law - Union
  • Litigation - Labor and Employment
Awards:
  • Issued the highest Peer Review Rating of AV Preeminent., AV Preeminent Rating, Martindale-Hubble
  • American Jurisprudence Bancroft-Whitney Award, UC Berkeley SOL Boalt Hall
  • Best of the Bar 2013-2016, Sacramento Business Journal
  • Named to Super Lawyers Northern California Rising Stars from 2011-2014 and to Super Lawyers Northern California every year since 2015.
  • Named to Top Attorneys in Sacramento by Sacramento Magazine since 2015.
Additional Areas of Practice:
  • Employment Law - Individuals
  • Mass Tort Litigation / Class Actions - Plaintiffs

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Publications

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