Security Guard & Patrol Service
| API Security Systems | 1803 W 43rd St | 77018 | (713) 680-3029 |
| G4s Secure Solutions USA | 1111 North Loop W # 100 | 77008 | (713) 426-9700 |
| Genesis | 1225 North Loop W # 100 | 77008 | (713) 868-5415 |
| Irongate | 2627 North Loop W # 202 | 77008 | (832) 384-1700 |
| MPS Security Svc | 2180 North Loop W # 110 | 77018 | (713) 787-0278 |
| Mustang Security | 3902 N Shepherd Dr # C | 77018 | (713) 864-8800 |
| Raptor Technologies Inc | 631 W 22nd St | 77008 | (713) 880-8902 |
| Rgg Svc Inc | 2030 North Loop W # 280 | 77018 | (713) 972-1719 |
| Sentenet Systems | 77008 | (713) 863-9891 | |
| WSA Group Inc | 1900 North Loop W | 77018 | (713) 680-3338 |
| Interactive Controls Inc | 551 N Shepherd Dr # 220 | 77007 | (713) 944-9094 |
