Lockheed Martin Space Systems Company is one of the four major business divisions of
Lockheed Martin. It has its headquarters in
Denver, Colorado with additional sites in
Sunnyvale, California;
Santa Cruz, California;
Huntsville, Alabama; and elsewhere in the
US and
UK. The division currently employs about 16,000 people, and its most notable products are commercial and military
satellites,
space probes,
missile defense systems,
NASA's
Multi-Purpose Crew Vehicle (formerly
Orion), and the
Space Shuttle External Tank.