| Business | Phone |
| Advanced Consulting Engineer Alexandria 22314 | (703) 841-1800 |
| Foster Miller Inc 2121 Eisenhower Ave 600, Alexandria 22314 | (703) 217-1294 |
| Vision Technologies System 99 Canal Center Plz 210, Alexandria 22314 | (703) 739-2610 |
| T Y Lin Intl 2034 Eisenhower Ave 240, Alexandria 22314 | (703) 245-5200 |
| Science Applications Intl Corp 4875 Eisenhower Ave 210, Alexandria 22304 | (703) 683-7900 |
| Minerva Corporation 4815 Eisenhower Ave, Alexandria 22304 | (703) 751-0112 |
| Hdr Inc 1101 King St, Alexandria 22314 | (703) 683-3400 |
| Leroy T Gravatte Iii Pe 6177 Grovedale Ct, Alexandria 22310 | (703) 922-9615 |
| Rannoch Corporation Inc 5252 Cherokee Ave, Alexandria 22312 | (703) 914-1430 |
| Dcs Corp 1330 Braddock Pl 700, Alexandria 22314 | (571) 227-6000 |