| Business | Phone |
| Asm Research Inc 3025 Hamaker Ct, Fairfax 22031 | (703) 645-9070 |
| Fulton Research 11351 Random Hills Rd, Fairfax 22030 | (703) 359-1720 |
| Kolten Research 10560 Main St, Fairfax 22030 | (703) 359-8747 |
| Metro Research Svc 9990 Lee Hwy 110, Fairfax 22030 | (703) 385-1108 |
| Metro Studying Inc 3900 Jermantown Rd, Fairfax 22030 | (703) 359-9800 |
| Myelin Project 3700 Cordova Pl, Fairfax 22031 | (703) 352-4128 |
| Piedmont Research Inc 12911 Point Pleasant Dr, Fairfax 22033 | (571) 323-1900 |
| Sigma Systems Research Inc 9725 Aspen Hollow Way, Fairfax 22032 | (703) 239-0638 |