| Business | Phone |
| Int'L Process & Research Data 8928 Lake Braddock Dr, Burke 22015 | (703) 425-1108 |
| Mc Kenna Micro Research 6123 Pond Lily Ct, Burke 22015 | (703) 951-0131 |
| Research Solutions Inc 9702 Schmidt Dr, Burke 22015 | (703) 906-9810 |
| Pi-Coor Clinical Research 8982 Fern Park Dr, Burke 22015 | (703) 426-0800 |