Donald Jason Cothern (born November 12, 1970)[1] is a United States Space Force major general who serves as the program executive for ground-based weapon systems at the Missile Defense Agency.

He served as the director of the Department of Defense’s Space Test Program and the Air Force's Hosted Payloads Office.

August 2011–June 2012, Student, Industrial College of the Armed Forces, National Defense University, Fort Lesley J. McNair, Washington, D.C. 12.

June 2012–July 2014, Chief, Requirements Integration Department, Defense Threat Reduction Agency and U.S. Strategic Command, Center for Combating Weapons of Mass Destruction, Fort Belvoir, Va. 13.

February 2024 – present, Program Executive for Ground-Based Weapon Systems, Missile Defense Agency, Redstone Arsenal, Ala.[5] Cothern is the recipient of the following awards:[5]