Isaac Thiel


Office: Fond du Lac, WI

Focus: As Controller, Isaac is responsible for oversight of the accounting team and financial statement reporting for all of The Commonwealth Companies.

Experience: Isaac received his Master’s degree in Accounting from UW-Whitewater and is a Certified Public Accountant (CPA). Prior to joining The Commonwealth Companies, Isaac spent over 4 years with public accounting firm Grant Thornton.  As an Audit Senior Associate, Isaac led teams performing financial statement audits at companies operating throughout Wisconsin and the United States. While gaining a wide variety of experience, his main focus was the construction industry. One of his clients was Faith Technologies, a large electrical contractor, and for the past 3+ years, he worked there as an Accounting Manager. As Accounting Manager, Isaac was responsible for managing the monthly closing cycle and financial statement preparation, along with many other general accounting functions.

Impressive Facts: With both parents coming from large families, Isaac has more than 40 aunts and uncles!

Fun Stuff: Isaac enjoys spending time outdoors with his wife Rachel and their dog Daisy. When he’s not working, you will find Isaac playing and watching sports, hiking at state and national parks, and spending time with friends and family.

Commonwealth is: dynamic. It is an environment that will keep you engaged and provides a lot of opportunities.


Affordable Housing Developer/Manager Awards $25,000 in Educational Scholarships to Residents

(Fond du Lac, Wis.) September 9, 2020 – The Commonwealth Companies, headquartered in Fond du Lac, has announced its 2020…
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The Ace Apartments Closing, Madison, WI

This past Friday, July 24th, our talented Development Team successfully closed on The Ace Apartments in Madison, WI!…
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Commonwealth has been extremely professional and courteous to the staff and the residents still living in our facility. They exceeded our expectations during the construction project as well as during the renovation of a 1923 school. Both projects have turned out to be beautiful and successful for our community.

Nancy McKenzie, Executive Director , Rhinelander Housing Authority