Aaron Worthman, partner and leader of the power and utilities team, has been with Baker Tilly since 1998. Aaron specializes in serving Tribal, governmental and utility entities. His experience includes performing financial audits and agreed-upon procedure reviews as well as preparing rate studies, cost of service studies, rate designs and financial forecasts.

Speaks on accounting and financial reporting topics at national and regional conferences as well as at Baker Tilly sponsored seminars

Teaches utility education courses for the APPA

Authors nationally and regionally published articles on utility regulation and accounting issues

AICPA, national governmental and not-for-profit training session

Baker Tilly, Electric cost of service and rate design

Baker Tilly, Single audit training sessions

Baker Tilly, Utility re-engineering audit update

WICPA, Governmental Financial Management Update

Wisconsin Rural Water Association, The business of running your utility

Aaron Worthman, partner on the energy and utilities team. He specializes in serving municipal utilities and joint action agencies. His experience includes performing financial audits and agreed upon procedure reviews as well as preparing rate studies, cost of service studies, rate designs and financial forecasts.

University of Wisconsin ‒ Eau Claire
Bachelor of Business Administration

Manages financial audits of numerous Tribal, governmental and utility entities

Provides OMB Uniform Guidance compliance audits of federally funded programs

Reviews and tests internal controls of the administration of grant programs

Analyzes the financial impact of construction projects on utility customer rates, borrowing needs and operational results

Prepares electric, water, sewer and stormwater rate filings, cost of service studies and rate design

Testifies as an expert witness before regulatory agencies and local governing bodies to support utility rate adjustments

Prepares annual budgets and long-range financial forecasts for municipal utilities

Assists with negotiation of retail utility service agreements related to large industrial developments and intergovernmental agreements

American Institute of Certified Public Accountants (AICPA)

Texas Society of Certified Public Accountants Austin Chapter

Wisconsin Institute of Certified Public Accountants (WICPA)

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