Zion Oil and Gas appointed Victor Carrillo as its CEO. He had been on the company’s board of directors since September 2010 and has served as president and COO since January 2011. Carrillo is also a director at Magnum Hunter Resources, a company that handles the acquisition, development, and production of unconventional resource plays. From 2003 to 2011, he was a commissioner of the Railroad Commission of Texas, a regulatory agency in Texas. Carrillo holds a BS in geology from Hardin-Simmons University, an MS in geology from Baylor University, and a JD from the University of Houston.