| Business | Phone |
| Cirrus Engineering Svc Alexandria 22304 | (703) 764-3123 |
| Energia Limited 661 S Washington St, Alexandria 22314 | (703) 836-1999 |
| Lockheed Martin Info Tech 5290 Shawnee Rd, Alexandria 22312 | (703) 916-7300 |
| Teledyne Brown Engineering Inc 6350 Walker Ln 110, Alexandria 22310 | (703) 822-8813 |