Paul A. Treinen, CPA

Paul A. Treinen, CPA

Tax and Advisory Partner and Firm Co-Managing Partner

Mr. Treinen has been in the public accounting field since 1990 when he joined White Nelson Diehl Evans LLP, one of Orange Counties largest accounting firms. He quickly advanced to Partner by 2010. He is a member of WNDE’s Executive Committee and is the Firm’s Co-Managing Partner. Mr. Treinen was formerly the Firm’s director of Tax and Advisory Services.

Mr. Treinen specializes in corporate and pass-through taxation and also has a very robust individual client base. Mr. Treinen has vast experience dealing with manufacturers and distributors and also has a number of clients that are focused in hospitality, retail, real estate, and senior care and aged services.

Mr. Treinen has extensive experience in mergers and acquisitions, transactional issues, business formations, and strategic exit strategy planning.


  • Retail and Consumer Products
  • Hospitality
  • Real Estate
  • Senior Care and Aged Services
  • Extensive Experience with Mergers, Acquisitions, Transactional Planning, Business Formations, and Exit Strategy Planning.


1989 California State University, Fullerton, California
Bachelor of Arts, with a major in Business Administration and a concentration in Accounting

Certificate of Education Achievement in Business Valuations, AICPA

CPA Designation: 1992

Professional Affiliations



Pacific Club, Orange County

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