| Business | Phone |
| Delphi Security Solutions Inc 1418 E Bitters Rd, San Antonio 78216 | (210) 499-4470 |
| International Ram & Assoc 9700 Airport Blvd, San Antonio 78216 | (210) 822-9448 |
| International Training Inc 10205 Oasis St, San Antonio 78216 | (210) 308-0188 |
| Protection Devices Inc 4830 Whirlwind St, San Antonio 78217 | (210) 654-3905 |
| Vallance Security Systems 225 E Elmira St, San Antonio 78212 | (956) 722-8224 |
| Southwest Security Consultants Po Box 34053, San Antonio 78265 | (210) 654-1135 |
| Whelan Security Co 10525 Huebner Rd, San Antonio 78240 | (210) 690-0322 |
| Friendly Security, Inc. 15150 Blanco Road Ste:8102, San Antonio 78232 | (210) 568-0306 |