| Business | Phone |
| Anteon Corp 2600 Tower Oaks Blvd, Rockville 20852 | (301) 816-0243 |
| Paradigm Holdings Inc 2600 Tower Oaks Blvd # 500, Rockville 20852 | (301) 468-1200 |
| Eer Systems Inc 1098 Taft St, Rockville 20850 | (240) 453-0717 |
| ECC IT Solutions, LLC One Research Court, Suite 150, Rockville 20850 | (301) 337-3100 |