| Business | Phone |
| Corsec Inc 10340 Democracy Ln 201, Fairfax 22030 | (703) 267-6050 |
| Digitronics Inc 3918 Prosperity Ave 325, Fairfax 22031 | (703) 698-9800 |
| Gemini Security Solutions 4031 University Dr # 200, Fairfax 22030 | (703) 934-2031 |
| Orion Systems Group 10560 Main St 214, Fairfax 22030 | (703) 691-1530 |
| Quorum Fairfax 22031 | (703) 938-2703 |
| Rapiscan Security Products Inc 11350 Random Hills Rd, Fairfax 22030 | (703) 934-6188 |
| Iriscan 5200 Pommeroy Dr, Fairfax 22032 | (703) 425-7977 |