Aaron W. Worthman

Aaron Worthman

Partner, CPA · +1 (512) 975 7281

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Aaron Worthman, partner on the energy and utilities team, has been with Baker Tilly since 1998. 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.

  • Manages financial audits of numerous municipal electric, water, sewer and stormwater utilities as well as joint action agencies
  • 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 regulating 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)
  • American Public Power Association (APPA)
  • Northwest Public Power Association
  • Texas Public Power Association
  • Texas Society of Certified Public Accountants Austin Chapter
  • Wisconsin Institute of Certified Public Accountants (WICPA)
  • 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




University of Wisconsin ‒ Eau Claire
Bachelor of Business Administration