4th Test and Evaluation Squadron

The 4th Test and Evaluation Squadron (4 TES) is a United States Space Force unit. Assigned to Space Training and Readiness Command's Space Delta 12, it is responsible for testing and evaluating the Space Force's electromagnetic spectrum capabilities. It is headquartered at Peterson Space Force Base, Colorado.

List of commanders

 * Lt Col Ryan Caulk, 27 August 2021
 * Lt Col Benjamin Szutar, 1 June 2022