90th CS welcomes new commander Published Aug. 29, 2016 By Staff Sgt. Christopher Ruano 90th Missile Wing Public Affairs F.E. WARREN AIR FORCE BASE, Wyo. -- Lt. Col. Josef Chesney assumed command of the 90th Communications Squadron during an assumption of command here, Aug. 29. An assumption-of-command ceremony is a tradition that represents a new commander assuming responsibility from the outgoing commander. Maj. David Sorrel, outgoing commander, will continue his Air Force career at Joint Base San Antonio, Texas.