New leader for 31st TES Published June 29, 2011 By 95th Air Base Wing Public Affairs EDWARDS AIR FORCE BASE, Calif. -- Lt. Col. Steven Tittel addresses attendees at the 31st Test and Evaluation Squadron change of command in Hangar 1810, June 27. Colonel Tittel assumed command of 31st TES from Lt. Col. Russell Hart who is headed to the Air War College in Alabama. Colonel Tittel previously served as the 31st TES director of operations. Col. Gregory Marzolf, 53rd Test and Evaluation Group commander, traveled from Nellis Air Force Base, Calif. to preside over the ceremony.