| 3rd Test and Evaluation Squadron | |
|---|---|
 Squadron emblem | |
| Active | 1990 – 2002 2006 – present |
| Country |  United States |
| Branch |  United States Space Force |
| Type | Space operations |
| Role | Technology experimentation, demonstration, and test |
| Part of | Space Delta 12 |
| Home base | Schriever Space Force Base, Colorado |
| Motto(s) | "Unequalled excellence" |
| Mascot(s) | Komainu (Japanese for 'guardian lion-dog') |
| Systems | |
| Decorations | Air Force Outstanding Unit Award |
| Website | Official website |
| Commanders | |
| Current commander | Lt Col David Heinz |
The 3rd Test and Evaluation Squadron (3 TES) (formerly 3rd Space Experimentation Squadron (3 SES)) is a space test and evaluation unit located at Schriever Space Force Base in Colorado.
As part of the United States Air Force, the squadron was described, in 2008, as "AFSPC's premier organization for space-based demonstrations, pathfinders and experiments. The unit identifies concepts of employment, training, education and technical skill sets required to field selected future AFSPC missions. The 3d SES will develop a core cadre of space professionals to serve as subject matter experts for all future AFSPC space-based endeavors, demonstrate operational utility of selected demonstrations and apply lessons learned from demonstrations and pathfinders for use in future initiatives."[1]