Derek Hilst, CPA
Senior Manager

Madison: (608) 442-1915

Janesville: (608) 756-4020

Derek is a Senior Manager in Wegner CPAs’ Assurance Department and leads the Rock County area office.  He has over twelve years’ experience providing accounting, auditing and not-for-profit advisory services to clients throughout Wisconsin and Northern Illinois. Derek annually attends continuing professional education seminars on accounting, auditing, compliance, and tax issues related to tax-exempt organizations. Derek came to Wegner CPAs in 2009 with seven years of experience in income tax preparation and business consulting.

  • Experienced in financial audits of many different types of organizations
  • Experienced in compliance audits, including Uniform Guidance, Government Auditing Standards, and various requirements of Wisconsin and Illinois State Departments.
  • Tax-exempt financial and compliance auditing niche.
  • Wrote various Timely Topic articles for clients.
  • Articles published in WSAE publication, Vantage Point.


  • Licensed Certified Public Accountant in Wisconsin and Illinois

Professional and Community Involvement

  • Member, Wisconsin Institute of Certified Public Accountants (WICPA)
  • Board Treasurer and Audit Committee Chair, Nutrition and Health Associates (Rock County Wisconsin WIC Program)
  • Member of the Janesville Morning Rotary Club


  • Bachelor of Science, Accountancy Major; Upper Iowa University

Just for Fun

When not at work, Derek loves spending time with his family and friends.  He also loves watching hockey and baseball games.