Lockheed Martin has submitted a proposal to continue the ground-based midcourse defense contract for the Missile Defense Agency. Much of the work will be done at Schriever Air Force Base in Colorado Springs.

The GMD development and sustainment contract will provide development, manufacturing, test, training, performance-based logistics, operations and sustainment of the ground missile defense element of the ballistic missile defense system.

Lockheed Martin is partnering with Raytheon for the contract. The two companies have been involved with ground missile defense systems for the past three decades.

Other locations for the GMD work: Huntsville, Ala.; Fort Greely, Alaska, Eareckson Air Station, Alaska and Vandenberg Air Force Base, Calif.