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William Post

William Post

Chairman of the Board and CEO (Retired), Pinnacle West Capital Corporation


  • Chairman of the Board and CEO (Retired), Pinnacle West Capital Corporation
  • Member, Board of Directors of the Global Institute of Sustainability and Innovation at ASU


Bill Post is a Valley leader and Director of First Solar, Blue Cross-Blue Shield of Arizona, the City of Hope, the Translational Genomics Research Institute, the ASU Foundation and ASU Enterprise Partners.

Under Mr. Post’s leadership, Pinnacle West Capital Corporation and its subsidiary, Arizona Public Service (APS), became leaders in Arizona’s sustainable business, founding Arizona Businesses Advancing Sustainability with Intel, and focusing on internal sustainable research and operations. APS continues to be a national leader in the adoption of Solar technologies and many other sustainable practices.

APS has been a member of the Coalition for Environmentally Responsible Economies (CERES) since 1995 and was the first utility to join the organization. APS’s Palo Verde Nuclear Generating Station (PVNGS), the nation’s largest energy producer, helps avoid over 30 million tons of carbon dioxide air emissions each year.


  • BS, Quantitative Systems, Arizona State University
  • Honorary Doctor of Humane Letters, Northern Arizona University