| Business | Phone |
| National Systems Management 22188 Three Notch Rd # E, Lexington Park 20653 | (301) 737-1661 |
| National Technologies Assoc 22738 Maple Rd # 105, Lexington Park 20653 | (301) 863-6512 |
| Navmar Applied Sciences Corp 48015 Pine Hill Run Rd # 100, Lexington Park 20653 | (301) 863-7980 |
| Platform Systems Inc Lexington Park 20653 | (301) 862-1496 |
| Porter Technical 21795 N Shangri La Dr, Lexington Park 20653 | (301) 737-4410 |
| Robert I Randall 19711 Teddy Rd, Lexington Park 20653 | (301) 862-4430 |
| Research & Engineering Dev Inc 48015 Pine Hill Run Rd, Lexington Park 20653 | (301) 737-4361 |
| Ausley Associates Inc 46611 Corporate Dr # St101, Lexington Park 20653 | (301) 863-2800 |
| Semcor 46621 Corporate Dr, Lexington Park 20653 | (301) 862-2900 |
| Sri Intl 19 Coral Dr # A, Lexington Park 20653 | (301) 862-4507 |
| Cci Inc 46579 Expedition Dr # 300, Lexington Park 20653 | (301) 866-0078 |
| Technical Data Analysis Inc 48015 Pine Hill Run Rd # 222, Lexington Park 20653 | (301) 866-9400 |
| Dcs Corp 46641 Corporate Dr, Lexington Park 20653 | (301) 866-9036 |
| Titan Corp 22290 Exploration Dr, Lexington Park 20653 | (301) 862-2900 |
| Vse Corp-Vss Div 46579 Expedition Dr # 301, Lexington Park 20653 | (301) 866-5000 |
| Wyle Laboratories 22300 Exploration Dr, Lexington Park 20653 | (301) 863-4200 |
| J F Taylor Inc 21610 S Essex Dr, Lexington Park 20653 | (301) 862-3939 |
| Meti Inc Applied Sciences 21795 N Shangri La Dr, Lexington Park 20653 | (301) 862-4308 |