| Business | Phone |
| Barna Engineering Herndon 20170 | (703) 620-1698 |
| Critical Eye Solutions 421 Arkansas Ave, Herndon 20170 | (703) 834-6600 |
| Dce 220 Spring St 530, Herndon 20170 | (703) 758-7507 |
| Fibertek Inc 510 Herndon Pkwy, Herndon 20170 | (703) 471-7671 |
| Gac Corp 509 Hunt Way Ln, Herndon 20170 | (703) 481-1700 |
| Galaxy Csi 2411 Dulles Corner Park 220, Herndon 20171 | (703) 793-8970 |
| Vision-It Inc 2502 Iron Forge Rd, Herndon 20171 | (703) 668-0717 |
| Hydrogeologic Consulting Inc 2822 Mustang Dr, Herndon 20171 | (703) 793-0699 |
| Techsnap Inc 2930 Fox Mill Rd, Herndon 20171 | (703) 394-5258 |
| Kimley-Horn & Assoc Inc 13755 Sunrise Valley Dr, Herndon 20171 | (703) 674-1300 |
| Koblos Townsend & Assoc 2323 Horse Pen Rd, Herndon 20171 | (703) 713-0300 |
| S & N Consulting Inc 2564 Belcroft Pl, Herndon 20171 | (703) 793-9270 |
| Radian Urs 13825 Sunrise Valley Dr 250, Herndon 20171 | (703) 713-1500 |
| Nala Technologies Inc 12607 Builders Rd, Herndon 20170 | (703) 810-1091 |
| P E Systems Inc 600 Herndon Pkwy, Herndon 20170 | (703) 478-2829 |