Milwaukee-area accounting firms Sitzberger Widmann & Company, S.C. and Hau & Associates, S.C. have merged to form Sitzberger Hau & Company S.C., effective immediately.

The newly combined firm now includes 16 CPAs and a staff of more than 38 across three Milwaukee-area offices. Financial terms were not disclosed.

“Dan Hau and the team of Hau and Associates complement our cornerstone ideal of quality professional public accounting services,” said Sitzberger Widmann founder Fred Sitzberger in a statement. “The expansion of the practice significantly increases our knowledge base and service for current and future clients, charting their financial course through the changing economic times.”

The merger, which took effect January 1 but was not announced until Monday, brings Sitzberger Hau into the top 24 of Milwaukee-area public accounting firms. Dan Hau established his practice in 1981 and brings more than 30 years of experience into the fold.

“I’ve known Fred for years and always admired his commitment to the profession,” said Hau. “In the end, it’s about super servicing our clients and with the merger, we’re able to synthesize the process and offer deeper expertise to our clients.”