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

Michael P. Ruggeberg

CPA · O'Connor, Brooks & Co., P.C.

Dubuque, Iowa 52001

Michael P. Ruggeberg, CPA in Dubuque, IA

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Michael P. Ruggeberg, CPA in Dubuque · CPA Seek