| Business | Phone |
| Potesta & Assoc Inc 508 Front Royal Pike, Winchester 22602 | (540) 450-0180 |
| Dewberry 601 E Jubal Early Dr C, Winchester 22601 | (540) 678-2700 |
| Engineering Products Controls 139 N Loudoun St, Winchester 22601 | (540) 542-0017 |
| Engineering Techniques Inc 132 N Braddock St # 1, Winchester 22601 | (540) 667-1105 |