| Business | Phone |
| Colonial Safeguards Inc Arlington 22204 | (703) 685-0826 |
| Control Security Inc 6700 Lee Hwy, Arlington 22205 | (703) 642-3508 |
| Countermeasures Ii Inc Arlington 22206 | (703) 845-5546 |
| Evigilant Inc 2420 Wilson Blvd, Arlington 22201 | (703) 387-0960 |
| G B Ntwrk Syst & Security Llc 2111 Wilson Blvd, Arlington 22201 | (703) 351-5099 |
| Protection Strategies Inc 2300 9th St S, Arlington 22204 | (703) 757-0244 |
| Quality Electronics 711 S Greenbrier St, Arlington 22204 | (703) 931-4444 |
| Caci International 2231 Crystal Dr 500, Arlington 22202 | (703) 647-2200 |
| Kastle Systems Intl Llc 1501 Wilson Blvd, Arlington 22209 | (703) 528-8800 |