| Business | Phone |
| Defense Group Inc 307 Annandale Rd 110, Falls Church 22042 | (703) 532-0802 |
| Dhc Corp Engineering 3534 Carlin Springs Rd 7, Falls Church 22041 | (703) 578-4484 |
| Dominion Polytopes 3312 Pathway Ct, Falls Church 22042 | (703) 599-8872 |
| Technical Science Corp 7526 Camp Alger Ave, Falls Church 22042 | (703) 204-2933 |
| J B & A Inc 5203 Leesburg Pike 705, Falls Church 22041 | (703) 399-2850 |
| Javis Automation & Engineering 5205 Leesburg Pike # 1500, Falls Church 22041 | (703) 820-5852 |
| Sts Intl Inc 5109 Leesburg Pike 411, Falls Church 22041 | (703) 575-5180 |
| Kauzlarich Consulting Inc 7019 Ted Dr, Falls Church 22042 | (703) 536-3486 |
| Mackall & Assoc 7635 Leesburg Pike, Falls Church 22043 | (703) 356-4466 |
| Hurst & Assoc 308 Hillwood Ave, Falls Church 22046 | (703) 534-7872 |
| Ibi Group 105 N Virginia Ave, Falls Church 22046 | (703) 237-8202 |
| International Vat Consltng Grp 105 N Virginia Ave 209, Falls Church 22046 | (703) 532-7401 |
| Richard S Carson & Assoc Inc 5107 Leesburg Pike, Falls Church 22041 | (703) 379-5700 |
| M A Engineering Consultants 200 Little Falls St # 405, Falls Church 22046 | (703) 241-7861 |
| Meany & Assoc 450 W Broad St, Falls Church 22046 | (703) 237-6600 |
| Technology Prospects Inc Falls Church 22046 | (703) 534-8750 |
| Sheladia Associates Inc 900 S Washington St # 201, Falls Church 22046 | (703) 237-7990 |
| Rajan Mahima Assoc 900 S Washington St 305, Falls Church 22046 | (703) 534-8088 |
| Rebull & Assoc 140 Little Falls St, Falls Church 22046 | (703) 534-8700 |
| Project Time & Cost 803 E Broad St, Falls Church 22046 | (703) 241-7900 |