Mr. Castleberry is the WTA's Chief Executive Officer, previously having served as the WTA's Manager of System Planning since the inception of the organization. Prior to joining the WTA, he served as Deputy Director of the Alameda County Transportation Authority (ACTA), where he helped author a widely supported extension of the county¹s half-cent sales tax, providing over $1 billion in funding for the County¹s transportation system. Earlier, Mr. Castleberry was a program manager for the construction of major transportation projects in the Bay Area. He holds a B.S. in Civil Engineering from the University of the Pacific and an MS degree from Stanford University in Infrastructure Planning and Management.