Stielstra has been a Certified Public Accountant and an accounting systems consultant. He has experience as the corporate treasurer for two nonprofit organizations in Wisconsin with responsibility for internal and IRS financial reporting, as well as the chief accountant for a Milwaukee-based home health agency. Stielstra received his master’s degree in accounting systems design & control, and applied those skills as a consultant implementing enterprise accounting systems, and doing data analysis, reporting and business intelligence for many organizations.