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William Marchbanks

Vice President

Property Tax


William leads an experienced group of property tax professionals in the southwestern United States. He ensures DMA’s property tax services are best-in-class for DMA’s entire client base. In addition, William partners with DMA’s clients in the areas of consulting, tax minimization, tax planning, and tax incentives. He performs detailed reviews of clients’ property assessments, negotiates assessment reductions via informal meetings with assessors, and successfully defends these positions before assessing jurisdictions and Appraisal Review Boards. William’s experience and industry knowledge provide clients with the highest level of professional service and proven results.



15+ years in property tax; 15 years with DMA


  • Completed several thousands of real and personal property tax assessment review projects
  • Expert in researching real estate markets, analyzing properties, and negotiating reductions at all levels
  • Extensive experience in the analysis and valuation of complex industrial and special-purpose properties
  • Generated $100M+ in property tax savings for clients
  • Litigation support

Louisiana | Oklahoma | Texas



Energy | Healthcare | Hospitality | Manufacturing | Oil & Gas | Petrochemical



PTES – Property Tax Enterprise System



  • Bachelor of Business Administration, Real Estate – Baylor University
  • Completed numerous courses in property valuation in undergraduate programs and through professional organizations such as the American Society of Appraisers (ASA), the Institute for Professionals in Taxation (IPT), the International Association of Assessing Officers (IAAO), and The Appraisal Institute
  • IPT – Certified Member of the Institute (CMI) designation
  • Member of the Texas Taxpayers and Research Association (TTARA), Texas Association of Property Tax Professionals (TAPTP)
  • Senior Property Tax Consultant (SPTC)