Lt. Col. Ross Dotzlaf, 316th Civil Engineer Squadron commander, gives closing remarks during an assumption of command ceremony at Joint Base Andrews, Md., Sept. 18, 2020. Dotzlaf’s last command was the 4th CES at Seymour Johnson Air Force Base, N.C., where he led 365 military and civilian personnel. (U.S. Air Force photo by Senior Airman Xiomara M. Martinez)