Aerospace Testing Alliance (ATA), a joint venture of Jacobs Engineering, Computer Sciences Corp, and General Physics, provides operations, maintenance, and support services at the Air Force's Arnold Engineering Development Center, Arnold Air Force Base, TN.

AEDC is the nation's largest complex of flight simulation test facilities. This $11 billion complex includes 58 aerospace test facilities with the ability to simulate flight from subsonic to hypersonic speeds at altitudes from sea-level to space. Twenty-seven of the center's facilities are unique in the United States; fourteen are unique in the world.