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-new%20york-extract.csv No state license number is on file. Specialties are blank until this preparer claims the listing. CPA Seek does not contact preparers.

Sheryl Lynn Riordan

CPA

Islip, New York 11751

Sheryl Lynn Riordan, CPA in Islip, NY

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Licenses

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