Carrillo succeeds John Brown, who was named chief executive officer in January 2014. Brown, Zion’s founder, will continue to serve as executive chairman.
Carrillo was appointed executive vice-president in January 2011. In October 2011 he was appointed president and chief operating officer.
Perry previously served on Zion’s board from January 2004 to December 2009. Perry has more than 40 years of experience in engineering and management in the oil and gas industry.