| Business | Phone |
| Avalon Fortress Security Corp Cheyenne 82001 | (307) 772-0911 |
| Cheyenne Security Systems Inc 3315 Morrison Ct, Cheyenne 82001 | (307) 635-2774 |
| Corporate Protective Svc Inc 400 W 15th St, Cheyenne 82001 | (307) 635-7473 |
| Guardsmark Inc 1111 E Lincolnway, Cheyenne 82001 | (307) 638-8668 |
| Security Co 7309 E Pershing Blvd, Cheyenne 82001 | (307) 632-2222 |