| Business | Phone |
| Cai Engineering Oakton 22124 | (703) 255-2240 |
| Duane Associates 11313 Hunt Farm Ln, Oakton 22124 | (703) 620-2022 |
| Sysnet Technologies 10461 White Granite Dr, Oakton 22124 | (703) 273-7806 |
| Roy D Mc Queen & Assoc 3112 Fox Den Ln, Oakton 22124 | (703) 648-9475 |
| Oakton Three Engineers Ofc 10467 White Granite Dr, Oakton 22124 | (703) 591-0615 |
| Oakton Two Engineers Office 10461 White Granite Dr, Oakton 22124 | (703) 385-0323 |