| Business | Phone |
| Vector Security 10642 Wakeman Dr, Manassas 20110 | (703) 369-1444 |
| Total Security Svc Intl 9236 Mosby St, Manassas 20110 | (703) 365-8188 |
| Crown International 11430 Balls Ford Rd, Manassas 20109 | (703) 335-0066 |
| Security American Settlements 8721 Plantation Ln, Manassas 20110 | (703) 257-2227 |