Lockheed Martin is a global aerospace and defense technology company that designs, manufactures, and sustains military aircraft, missile defense systems, helicopters, and space systems primarily for U.S. Government agencies and international allies. The company operates through four business segments—Aeronautics (which includes the F-35 fighter jet), Missiles and Fire Control, Rotary and Mission Systems (helicopters and integrated warfare systems), and Space (satellites and strategic systems)—and generates revenue through development, production, sustainment, and support contracts for these defense platforms and related services. The company competes on technical excellence, reliability, cost competitiveness, and program execution reputation, and employs over 120,000 people including tens of thousands of engineers and scientists.