Bonnie Lilley CPA, CGMA®, MBA

(262) 923-5214   
professionals-icon PROFESSIONALS


Bonnie is a Principal and member of Business Advisory Services in Milwaukee. Bonnie has over 23 years of experience performing and managing audits, reviews and compilations.

Bonnie works with clients on understanding their business, the challenges they are facing, and helping them with a proactive strategic approach to growing their business.

She brings a solid base of knowledge specific to closely-held businesses, allowing her to assist clients not only with their accounting and financial needs, but also with basic management, process improvement, governance, and tax matters.

In addition, she works with clients to identify, improve, and maintain effective internal controls as well as accounting procedures to help them manage and control their business more efficiently and economically.

Bonnie has worked with a wide array of clients including manufacturers, distributors, contractors, and nonprofits performing and supervising audits, reviews and compilations and providing consulting and support services. In addition, she has global experience working in Asia, Europe, and South America.

Bonnie is a member of the American Institute of Certified Public Accountants (AICPA), the Wisconsin Institute of Certified Public Accountants (WICPA) and an annual presenter at the Waukesha STEM Academy.


  • Carroll College - Bachelor of Business Administration - Accounting
  • University of Wisconsin - Milwaukee - Masters of Business Administration


  • Certified Public Accountant (CPA)
  • Masters of Business Administration (MBA)
  • Global Management Accounting Designation (CGMA®)

Speaking Experience

  • Annual presenter at the Waukesha STEM Academy

Professional Memberships/Affiliations/Activities

  • American Institute of Certified Public Accountants (AICPA)
  • Wisconsin Institute of Certified Public Accountants (WICPA)