| Business | Phone |
| Convergent Solutions 700 N Fairfax St 604, Alexandria 22314 | (703) 299-9013 |
| Metro Systems Inc 500 N Washington St, Alexandria 22314 | (703) 683-5101 |
| Jlm Systems 29 N Jordan St 404, Alexandria 22304 | (703) 567-4220 |
| Analex Corp 5904 Richmond Hwy # 300, Alexandria 22303 | (703) 329-9400 |
| General Dynamics Corp 6400 Grovedale Dr, Alexandria 22310 | (703) 683-7287 |
| Aquarian Technology 6166 Wellington Commons Dr, Alexandria 22310 | (703) 922-0529 |
| Systems Support Alternative 5845 Richmond Hwy 405, Alexandria 22303 | (703) 960-5500 |