U.S. Air Force Space and Missile Systems Center (SMC)
The Space and Missile Systems Center, a subordinate unit of Air Force Space Command, is the center of technical excellence for developing, acquiring, fielding and sustaining military space systems. SMC's mission is to deliver resilient and affordable space capabilities. The center is responsible for on-orbit check-out, testing, sustainment and maintenance of military satellite constellations and other Department of Defense space systems. SMC is headquartered at Los Angeles AFB in El Segundo, Calif. The center employs an estimated 6,300 people including military, civilians and contractors at LAAFB and other locations worldwide.