| Johnson Controls Fire Protecti | St. Louis,MO 63146 | (314) 739-4014 | (314) 739-3755 |
| Brown Electric, Inc. | Goreville,IL 62939 | (618) 995-2870 | (618) 995-2506 |
| CTS Technology Solutions, Inc. | Sparta,IL 62286 | (618) 443-3068 | (618) 443-2299 |
| O'Fallon Electric Company | O'Fallon,IL 62269-0488 | (618) 632-3577 | (618) 632-8690 |
| Guarantee Electrical Construct | Granite City,IL 62040 | (618) 452-6122 | (618) 452-6973 |
| R.E. Pedrotti Co., Inc. | Fenton,MO 63026 | (636) 349-7100 | |
| Comm Squad | Lebanon,IL 62254 | (618) 624-8340 | (618) 624-8380 |