| Business | Phone |
| Advantage Security Inc 12200 E Iliff Ave # 204, Aurora 80014 | (303) 755-4407 |
| All American Security Inc Aurora 80011 | (303) 364-5566 |
| C & D Security 13693 E Iliff Ave, Aurora 80014 | (303) 338-8816 |
| Colorado Protective Svc Aurora 80011 | (303) 361-0020 |
| Custom Security Enforcement 13918 E Mississippi Ave # 259, Aurora 80012 | (720) 870-0969 |
| Denver Security Svc 1132 Kingston St, Aurora 80010 | (303) 426-7008 |
| Hatton Industries Security Svc 1730 S Abilene St # 205, Aurora 80012 | (720) 747-9317 |
| Ipc Intl 14200 E Alameda Ave, Aurora 80012 | (303) 341-0050 |
| On Guard Investigations 11275 E Mississippi Ave, Aurora 80012 | (303) 340-1656 |
| Securitas Security Svc Usa Inc 2851 S Parker Rd # 100, Aurora 80014 | (303) 751-1000 |
| Xpd Security Police Inc 1701 Chambers Rd # E, Aurora 80011 | (303) 337-2929 |
| Viper Security 1532 Galena St # 340, Aurora 80010 | (720) 495-6651 |
| Wackenhut Corp 15290 E 6th Ave # 250, Aurora 80011 | (303) 341-4433 |
| Statewide Protective Svc 2194 E Ensenada, Aurora 80014 | (303) 695-5521 |