1. Lockheed Martin 22300 Comsat Dr, Clarksburg, MD 20871 Coordinate: 39.21875,-77.27447 Phone: (301) 428-4000
2. Lockheed Martin 22530 Gateway Center Dr, Clarksburg, MD 20871 Coordinate: 39.23047,-77.2811 Phone: (301) 540-4070