PeterMainstain1Peter Mainstain, CPA is a co-founder of  Tanner Mainstain Glynn & Johnson, has extensive experience in all phases of the entertainment and sports industries, including personal business management, financial and retirement planning. Peter holds a Bachelor of Science in Business Administration and Accounting from California State University, Northridge, and has done post-graduate study at the USC and Golden Gate University. Peter has taught at UCLA, and has been a guest lecturer at industry and professional organizations.

Tanner Mainstain Glynn & Johnson “TMGJ”
Founded in 1975, TMGJ has built a reputation as one of Los Angeles’ largest and most respected accounting and business management firms. Located in Westwood, the Firm consistently ranks in the Los Angeles Business Journal’s “Top 50 Accounting Firms” “A” List comprised of Los Angeles-based offices of National and Regional Accounting Firms. TMGJ’s client roster includes some of the top names in entertainment, sports and business.

Peter Mainstain is a Certified Public Accountant practicing in Los Angeles, California with e-filing capability.

Certified public accountants’ required training equips them with a broad understanding of America’s tax system, making them a reliable source for tax preparation.

Tel. (310) 446-2703
Fax. (310) 446-2706




Chairman of the Board, Arthritis Foundation-Pacific Region

Water Buffalo Club

Board of Governor, City of Hope