Atty. David E. Mastagni
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.
Profile Summary
About David E. Mastagni at a glance
David E. Mastagni is a employment and litigation attorney based in Sacramento, California, practicing at Mastagni Holstedt A Professional Corporation. Admitted to practice in United States, American Bar Associtation, California, State Bar of California, and California, Sacramento County Bar Association. Educated at University of California Berkeley (J.D., 1999) and University of California Davis (B.A., 1996). Recognitions include Best Lawyers in America — Employment Law - Individuals (2026), Best Lawyers in America — Labor Law - Union (2026), and Best Lawyers in America — Litigation - Labor and Employment (2026). Serands clients in Sacramento, CA and the surrounding metropolitan area.
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About
- 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
Practice Areas Explained
David E. Mastagni's Areas of Practice
Each practice area below reflects the types of cases David E. Mastagni handles, with a brief overview of what that area of law covers.
Employment lawyers represent workers in wrongful termination, discrimination, harassment, wage & hour disputes, and severance negotiations.
David E. Mastagni is one of 169,120 employment attorneys indexed nationally. Browse employment attorneys in California →
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
David E. Mastagni is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in California →
Jurisdictional Context
Why local counsel matters in California
Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Sacramento are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in California courts without local counsel or pro hac vice admission.
Looking for additional California attorneys? Browse all attorneys in Sacramento or all attorneys in California.
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