Listed as a CPA in IRS public preparer records. Source: IRS PTIN FOIA extract (Feb 2026), retrieved October 23, 2026. https://www.irs.gov/pub/foia/foia-colorado-extract.csv No state license number is on file. Specialties are blank until this preparer claims the listing. CPA Seek does not contact preparers.

Mark David Dennis

CPA · SL Biggs, A Division of SingerLewak LLP

Denver, Colorado 80222

Mark David Dennis, CPA in Denver, CO

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Mark David Dennis, CPA in Denver · CPA Seek