| Business | Phone |
| Raytheon Co 46579 Expedition Dr, Lexington Park 20653 | (301) 863-6100 |
| Lockheed Martin Corp 21530 Pacific Dr # B, Lexington Park 20653 | (301) 737-4800 |
| Lockheed Martin Corp 46611 Corporate Dr, Lexington Park 20653 | (240) 725-0112 |
| Lockheed Martin Corp 747 Great Mills Rd # 1, Lexington Park 20653 | (301) 863-6617 |