William Mueldener, CMI

Principal and Denver Office Managing Partner, National Director of State and Local Tax


Phone: (303) 298-9600

Email: Email William

View: LinkedIn Profile


  • CMI


  • Bachelor of Arts - Fort Lewis College Master of Arts - University of Denver

About William Mueldener, CMI

Bill brings over two decades of experience to his work with national and international companies. He specializes in state income/franchise tax, sales/use tax, excise taxes, and incentives. In addition to working with companies on their tax compliance, he assists clients with mergers and acquisitions, state tax planning, credit studies, incentive negotiation and state audit controversy consulting.

Bill has served as an expert witness in court cases addressing state and local tax matters and has lectured on state and local tax. He has also consulted with state legislators and drafted numerous bills addressing tax matters, such as the development of tax incentives to promote the expansion of datacenters and repealing the taxation of software. While addressing state tax matters in a wide range of industries, Bill has significant experience in the energy, technology and retail industries.

Prior to joining Hein in 2007, Bill worked for 13 years in state and local tax for both industry and at Big Four accounting firm giving him a uniquely varied background. His experience includes such industries as energy, manufacturing, retail and healthcare. Currently, he serves as a board member for the Colorado Technology Association; a member of the Tax Council for the Colorado Association of Commerce and Industry; a member of the Institute for Professionals in Taxation; and on the Tax Council for the Colorado Council of Petroleum Accountants Societies. He received his Bachelor of Arts degree from Fort Lewis College and his Master of Arts degree from the University of Denver.

Areas of Specialization:

  • Income/ Franchise Tax
  • Sales/ Use Tax
  • Severance Tax
  • Merger and Acquisition
  • Credit Studies
  • Incentive Negotiation
  • Audit Management