| Business | Phone |
| Nuclear Expertise Inc 11213 Lee Hwy M, Fairfax 22030 | (703) 352-4912 |
| Bem Systems Inc 4151 Chain Bridge Rd, Fairfax 22030 | (703) 218-1775 |
| Engineering Environmental Mgmt 3949 Pender Dr # 120, Fairfax 22030 | (703) 273-7171 |
| Healthy Buildings Intl Inc 9401 Mathy Dr 100, Fairfax 22031 | (703) 323-4400 |
| Cdm Federal Programs Corp 13135 Lee Jackson Memorial Hwy, Fairfax 22033 | (703) 968-0900 |
| Tidewater Inc 2821 Dorr Ave # Q, Fairfax 22031 | (703) 204-3580 |
| Wilson Cunningham Co 10720 Scott Dr, Fairfax 22030 | (703) 591-7401 |