Accounting Firm

Derek Thomas, CPA/ABV

Southern California accountant focused on business valuation, litigation support and expert witness work

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TrustList summary

Derek Thomas, CPA/ABV is a certified public accountant in Southern California whose practice centres on valuing businesses and giving expert evidence in financial disputes. He has worked in the profession for more than 35 years, serving both companies and private individuals, and now practises on his own.

Products and services

Business valuations: valuations prepared for estate and gift planning, succession, divorce, litigation and the sale or purchase of a company.
Expert witness testimony: evidence on valuation, breach of contract, shareholder disputes and business damages.
Court appointments: work as a court-appointed receiver and as a Section 730 witness.
Estate and succession planning: financial support for owners planning to pass on or wind down a business.

Who it serves

The practice serves business owners, individuals and their legal advisers. Thomas has testified in California Superior Court and in the Delaware Court of Chancery.

Key facts

Based in: Temecula, Southern California
Founded: 1979, when he opened his own practice after starting out as an auditor
History: merged with Joseph Kuebler in 1987 to form Kuebler, Thomas & Co, returning to solo practice in 2000

Summary written by TrustList from the business's own published information, Sep 2026.

Rankings

Derek Thomas, CPA/ABV is ranked on 1 TrustList ranking at #4.

Every ranking orders its listings by their reviews, how complete the profile is and the Trust Score. Derek Thomas, CPA/ABV has no reviews yet and 3 of the 10 profile details we look for. Where no listing on a page has been reviewed, the order follows the profiles alone.

Accounting firm · 1 ranking

#4of 15
Southern california
Its profile: “Derek Thomas, CPA/ABV is a certified public accountant in Southern California whose practice centres on valuing businesses and giving expert evidence in financial disputes.”
Of the 15 here, 19 also cover tax and 13 also cover accounting; 20 also work in California and 5 also work in Los Angeles.
Behind Axelrod & Farley Income Taxes, ahead of Gelman LLP, CPAs & Business Advisors.

As of 2026-11-01. Organic ranks only; sponsored placements are never ranks. How TrustList ranks