About US
Who We Are
RP&B CPAs is a premier, full-service accounting firm located in the Inland Empire. We have been serving clients for over 35 years in the Inland Empire, Southern California and throughout the United States.
We specialize in financial statement compilations, reviews, audits and tax compliance services, tax/business planning and ESOP consultation in a variety of industries, including:
- Construction
- Manufacturing
- Distribution
- Transportation
- Professional Services
- Consumer Services
- Nonprofits
- Related Privately-Held Businesses
Our Shareholders

Michael J. Kouyoumdjian, CPA
Managing Shareholder

Cristen D. Stier, CPA, MBA
Shareholder, Accounting & Auditing

Michael Zermeño, CPA
Shareholder, Accounting & Auditing

Fernando Ayala, CPA
Shareholder, Tax & Compliance