Mark Olson, CPA, CSEP®
Mark Olson has been with Conway, Deuth & Schmiesing, PLLP (CDS) since the firm was founded in 1985. Mark was admitted as a Partner in 1986. He has over thirty years of experience in public accounting. Mark graduated from Ridgewater College in Willmar, MN, from the Accounting program. He received his CPA certification in 1985 from the Minnesota Board of Accountancy and in 2007 earned the professional designation of Certified Specialist in Estate Planning® (CSEP) certification. After Mark's retirement from the CDS partnership in 2018, he continues to remain a trusted advisor to our clients. We are excited to have his expertise and knowledge with our firm in the years to come. Mark practices in a variety of accounting and tax areas, but specializes in agribusiness, tax planning and preparation, estates and trusts, fire reliefs, business consulting, and succession planning.


Mark is a member of the American Institute of Certified Public Accountants (AICPA) and the Minnesota Society of Certified Public Accountants (MNCPA). He is a member, past President and Treasurer of the Willmar Sertoma Club and currently serves on the board of the Dovre Township.

P   (320) 214-2930

T   (888) 388-1040

F   (320) 235-7071


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Mark Olson, CPA, CSEP®

Conway, Deuth, & Schmiesing, PLLP

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