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Olsen Thielen has been named a "Regional Leader" on Accounting Today's list of "Top Firms in the Midwest" for 2022. OT ranks as one of the top-performing CPA firms with under 100 employees as well.
Kelly joined Olsen Thielen in 1985, after six years with a CPA firm in northern Minnesota. We thank Kelly for his leadership in our Eden Prairie office and offer him our best wishes as he transitions to his new role as a retiree.
An anniversary celebration is often an exercise in internal reflection. For Roseville-based Olsen Thielen & Co., LTD, celebrating its 100th anniversary later this fall is more about those external entities who have made its century of existence possible.
Like most business owners, you’ve probably heard about 100% bonus depreciation. It’s available for a wide range of qualifying asset purchases. But there are many important details to keep straight. Here are five key points about this powerful tax-saving tool.
Nearly 100 years ago, Olsen Thielen was founded on the belief that personal attention, trust, and quality service were the key elements to helping our clients succeed, and that commitment remains.  commitment to their clients and their community. 
Here at Olsen Thielen, we are ready to say goodbye to 2020 and are very excited to welcome 2021 as we get ready to celebrate our 100-year anniversary!
After a long and remarkable career, Linda Nelson has decided that effective December 31, 2020, she will be retiring from Olsen Thielen.  We want to thank Linda for her knowledge, dedication, and everything she did for clients and colleagues.
We are pleased to congratulate Olsen Thielen's principal, Magen Koepp, for being named a Top Women in Finance 2020 Honoree. Finance & Commerce has honored Minnesota’s Top Women in Finance each year since 2001. 
We are pleased to announce that Adam P. Thielen, CPA, was elected Principal, effective September 1, 2020.
Olsen Thielen continues to take significant steps toward "Going Green", which includes paperless audit and tax returns.
After 40 years at Olsen Thielen, Andy Janneke is transitioning his responsibilities and will be retiring in December 2019.
We are pleased to announce Matthew J. Klein and Nathaniel L. Nelson have been elected Principals of the firm, effective September 1, 2019. With their election, Olsen Thielen now has 21 Principals and over 86 staff.
With great sadness we announce the passing of a Robert J. Olsen on March 13th.  Bob was a terrific business leader, mentor, husband, and father.  Bob and Reynold Thielen took the reins of the firm in 1957 and led it through a period of tremendous growth. 
Olsen Thielen is pleased to announce Magen M. Koepp was elected Principal of the firm, effective September 1, 2018. Magen is an Employee Benefit Plan Specialist and has ten years of experience in accounting, auditing and consulting.
Olsen Thielen is proud to announce Adam Hennen has been appointed Board Chair for the White Bear Area Chamber of Commerce.
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