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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

Tashayla D. Billington

(916) 446-4692 | VCard

Tashayla DeVaney-Billington is an Associate with the labor department of Mastagni Holstedt. Her practice focuses on the Public Safety Officers Procedural Bill of Rights Act and the Meyers-Milias-Brown Act. She is also a PORAC LDF panel attorney and represents clients in disciplinary matters, grievances, and critical incidents. Shay also advises clients on a variety of labor and employment related matters.

During law school, Shay spent her summers working at Mastagni Holstedt as a Law Clerk. Shay has close family members in law enforcement and is dedicated to representing public safety officers.

Shay earned her J.D. from the University of the Pacific, McGeorge School of Law with an emphasis in Advocacy. She graduated Order of the Coif and Order of the Barristers.


  • J.D., University of the Pacific, McGeorge School of Law (2015)
  • B.A., University of California, Berkeley (2009)