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About our CPA Firm in San Diego

Group picture of Thefeld and Associates Team

Thefeld and Associates is a full functioning CPA firm that is committed to providing personal, goal-oriented accounting, consulting, tax, and real estate services. We are committed to excellence that is reflected in timely personal attention to our clients ‘needs and to utilizing state-of-the-art accounting practices and technology.

It is our priority to demonstrate a genuine commitment to the well-being of our clients and not merely the interests of the firm. In everything we do, we are committed to showing respect to our clients and uncompromising integrity in client relations throughout every aspect of our practice. We believe that there is no greater benefit to us than our clients’ well being.



Warren Thefeld, CPA

Warren has 32 years of public accounting experience with primarily focus on the taxation and accounting areas of small business. He is a business consultant, retirement planning and succession planning expert. ... learn more

Yuri Williams, CPA, CVA

Ms. Williams is in charge of the firm’s valuation division. She has performed and managed a wide variety of business valuation assignments, including management and ESOP leveraged buyout transactions.... learn more

MaryJoy Amog, CPA

Joy received her Bachelor of Science degree in Business Administration from the University of Santo Tomas, in Manila, Philippines, where she majored in Accounting. Since moving to the United States, she gained over 15 years of private and public accounting experience. This includes... learn more

Jee-Keow Jenelle How, CPA

Jenelle was born and raised in Singapore. Jenelle graduated with a Bachelors Degree in Accounting (Magna Cum Laude) from Oral Roberts University at Tulsa, Oklahoma in 1991. After graduation, she relocated to San Diego, California to work at Frazee Industries, Inc. as an Assistant Accountant. ... learn more

Elizabeth Flinn

Elizabeth earned her B.A in Business Administration with a concentration in Accounting in June 2014 from Cal State San Marcos. Since graduation, Elizabeth has continued to purse knowledge in public accounting, and is currently working towards obtaining her CPA license.At the firm, she works as a staff accountant... learn more

Faith Lastrella

After graduating from University of California at Santa Barbara in 2011 with a B.A. in Business Economics with an Accounting emphasis, Faith moved back home to San Diego to pursue a career in public accounting.... learn more

Sandra Puchahes

Sandra worked for Thefeld & Associates since 1990, starting as the receptionist and staff support. She works closely with staff and has a great working relationship with clients.... learn more