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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

Shayleen Mastagni

Shayleen Mastagni


Shayleen Mastagni is a Certified Public Accountant.

Previously, Shayleen was a Senior Vice President in the Forensic and Valuation Group at Perry-Smith, LLP doing litigation consulting, business valuation and public accounting. She brings over nine years of experience in the forensic accounting field after graduating from the University of the Pacific with a Masters in Business Administration with an Emphasis in Finance and an undergraduate degree from Cal Poly, San Luis Obispo in accounting. In addition, Shayleen is Certified in Financial Forensics and Accredited in Business Valuation.

Shayleen has expertise in economic damages for personal loss, commercial business, damages in wage and hour litigation and consulting on city and county financial information analysis. She will be able to assist our union clients with detailed city and county financial analysis for labor negotiations and wage and hour damage calculations. Shayleen will also be assisting our personal injury department in preparing comprehensive wage loss analysis for individuals.