| Business | Phone |
| Airbus North America Holdings 198 Van Buren St 300, Herndon 20170 | (703) 834-3400 |
| Apex Covantage 198 Van Buren St 120, Herndon 20170 | (703) 709-3000 |
| Core Engineered Solutions 8500 Leesburg Pke, Herndon 20170 | (703) 883-8176 |
| Extension Group 13800 Coppermine Rd, Herndon 20171 | (703) 234-7815 |
| Systemware Inc 703 Archer Ct, Herndon 20170 | (703) 318-0350 |
| Lighthouse Business Developmnt 1273 Mason Mill Ct, Herndon 20170 | (703) 444-5400 |
| Marketswitch Corp 2350 Corporate Park Dr 400, Herndon 20171 | (703) 444-6750 |