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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

Erin Dervin


Erin M. Dervin joined Mastagni Holstedt, A Professional Corporation as a senior associate in the Labor department.

Previously, she was a prosecutor with the Shasta County District Attorney’s Office. There, she handled litigation and trials including complex financial crimes, sexual assaults, narcotics, domestic violence and general felony practice. She has tried over 60 jury trials.

Erin also prosecuted civil cases in the area of Consumer Fraud and Unfair Business Practices, obtaining judgments against numerous national and multi-national organizations.

Erin has been an adjunct professor in Criminal Justice at National University, and has instructed law enforcement in the areas of Welfare and Institutions Code Section 5150 as well as in investigative techniques in financial crimes. Erin coordinated the Shasta County Mock Trial Competition for fourteen years.


  • J.D., California Western School of Law (1997)
  • B.A., Sonoma State University (1994)