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.
Employment Law - Individuals & More Attorney · Serving Sacramento, CA
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). Serves clients in Sacramento, CA and the surrounding metropolitan area.
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About 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
- 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 Legal Practice
Each practice area below reflects the types of cases David E. Mastagni handles, with a practical overview of what that area of law involves and how it may apply to your situation in Sacramento.
Employment Law in Sacramento
Employment lawyers represent workers in wrongful termination, discrimination, harassment, wage & hour disputes, and severance negotiations.
David E. Mastagni is one of 167,770 employment attorneys indexed nationally. Browse employment attorneys in California →
Civil Litigation in Sacramento
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
David E. Mastagni is one of 450,750 litigation attorneys indexed nationally. Browse litigation attorneys in California →
Jurisdictional Context
Why Local Counsel Matters in Sacramento
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 venue, 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.
Sacramento Courts and Legal Process
Choosing a Sacramento-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
Looking for additional California attorneys? Browse all attorneys in Sacramento or all attorneys in California.
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Professional Profile
Why Clients in Sacramento Choose David E. Mastagni
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish David E. Mastagni's practice in the field of employment and litigation.
Multi-State Bar Admission
Licensed in United States, American Bar Associtation, California, State Bar of California, and California, Sacramento County Bar Association, David E. Mastagni can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering employment and litigation, David E. Mastagni can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Sacramento
A Sacramento-based practice means David E. Mastagni attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
Case Types
Common Legal Issues David E. Mastagni Handles in Sacramento
Below is a representative sample of the types of matters David E. Mastagni has experience with under California law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.
This list is illustrative, not exhaustive. Contact David E. Mastagni directly to discuss the specifics of your situation.
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David E. Mastagni's Practice Areas & Specializations
Education & Law School Background
Awards & Professional Honors
Bar Admissions & Licensed Jurisdictions
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