Our Team

Bonnie Konwinski, CPA


Bonnie is the Manager in our Sycamore office.  She joined Siepert in 2009 as a Supervisor and works in the areas of compilation, income and sales tax return preparation, and payroll. She became a Quickbooks ProAdvisor in July 2011. Bonnie received her accounting degree from Lewis University in Romeoville, Illinois. She began her career with a major utility company compiling financial statements for subsidiaries and eventually moved into the role of accountant in charge of budgeting and processing for the southern division of the company.

In July 2018, Bonnie was promoted to Manager in our Sycamore office.

Bonnie has been involved in her community by offering her services as treasurer of several organizations including Sycamore Sports Boosters and the Legacy capital fundraising campaign for St. Mary Church in Sycamore. She is a graduate of the 2010-11 DeKalb Leadership Academy.

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