William Post is Chairman of the Board of Arizona Public Service (APS) and Chairman of the Board and Chief Executive Officer of its parent company, Pinnacle West Capital Corporation (Pinnacle West). Post joined APS in 1973; became an officer in 1982; became President and CEO of APS and President of Pinnacle West in February 1997; and was named Chairman of the Board of both companies in February 2001.

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William J. Post
Chairman of the Board & Chief Executive Officer, Pinnacle West Capital Corporation