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  • The Sacramento County Deputy Sheriffs' Association has utilized the services of Mastagni Holstedt, A Professional Corporation for over 30 years. During my tenure as Association President there has not been one situation that the firm could not handle... Read more >

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Mastagni Holstedt, A Professional Corporation
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Northern California Location
1912 I Street
Sacramento, CA 95811
916-446-4692 Phone
916-447-4614 Fax
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Southern California Location
9327 Fairway View Place, Suite 304
Rancho Cucamonga, CA 91730
909-477-8920 Phone
Other Locations in Whittier, Chico, Stockton and San Jose

Phillip R.A. Mastagni

(916) 491-4278 | [email protected] | VCard

Attorney Phillip Mastagni is Partner in the civil litigation department of the firm Mastagni Holstedt, APC. Mr. Mastagni specializes in civil litigation, including trial and appellate litigation in California and federal courts. An experienced litigator as well as a PORAC Legal Defense Fund panel attorney, Mr. Mastagni is admitted in U.S. District Courts for the Southern, Eastern, Northern and Central Districts of California, and the U.S. Court of Appeals for the 9th Circuit. Mr. Mastagni has also been admitted pro hac vice in the US District Court for Wyoming and Utah State Court, 3rd Judicial District (Salt Lake County). Mr. Mastagni handles accidents and cases nationwide, including Texas, Utah, Nevada, Virginia, Maryland, Florida, Wyoming, Oregon, Washington, West Virginia, Washington, D.C. North Caroline, and Maryland. Mr. Mastagni also handles international accidents, cases, including, in Russia, Germany, France, Korea, India, Italy, Canada, China, Japan, and the U.K.

Mr. Mastagni has an impressive resume having handled complex civil litigation, including breach of contract, business tort, fraud, breach of fiduciary duty, unfair business practice, Labor-Management Reporting and Disclosure Act 29 U.S.C. 501 violation, Whistleblower, Qui Tam, aviation (commercial and private plane crashes), products liability, tort, catastrophic injury, employment and wrongful termination litigation. He has handled litigation from inception through trial and jury verdict and is well versed in international civil litigation. While a student at Georgetown University Law Center, he focused his studies in international and European Union law. Mr. Mastagni speaks fluent German. Mr. Mastagni has litigated and been involved with cases and discovery in France, the U.K. Canada (Quebec), Japan, Korea, China, Mexico, and elsewhere, both through US courts as well as the Hauge Convention.

Mr. Mastagni has handled many complex, international, and multi-state cases, including, products liability cases regarding helicopters, airplanes, motorcycles, cars, sports equipment, tucks, fire trucks, scissor lifts, bucket trucks, machinery, tractors/ harvesters, backhoes, and other defective products. Mr. Mastagni has also handled many complex aviation cases, including commercial flights, international flights, private flights, and bother fixed wing aircraft (airplanes) and rotary craft (helicopters). Mr. Mastagni also has handled many commercial trucking accidents, big rig accidents, and roadway design defect accidents. Mr. Mastagni handles electrical injury and electrocution cases, including against PG&E, Pacific Bell, local utilities, and telecommunication companies. Mr. Mastagni handles fire damage and burn injury cases. Mr. Mastagni frequently handles complex traumatic brain injury cases, including traumatically induced seizures disorders, mild, moderate and severe traumatic brain injuries. Mr. Mastuccessfully represented victims of the Asiana Airlines Flight 214 crash at San Francisco International Airport, both in the US and abroad. Mr. Mastagni has litigated and been involved with products liability cases against Ford, BMW, Harley-Davidson, Pierce Manufacturing (fire apparatus), Spartan Motors (fire apparatus), Terex (bucket trucks), Dupont (industrial equipment), Turbomeca (helicopter jet turbine manufacturer), e-cigarette manufactures, battery manufacturers, industrial equipment manufacturers, sporting goods manufactures, and many other types of industrial and consumer products, vehicle, and aircraft manufacturers.

In addition to UC Berkley and Georgetown Law Center, Phillip Mastagni is also a graduate of the prestigious National Trial Advocacy College at the University of Virginia Law School, the Country’s premier hands-on trial advocacy program for lawyers.



  • German (fluent)