| Business | Phone |
| Access Control Technology 750 Front Ave Nw, Grand Rapids 49504 | (616) 493-0400 |
| Actech Llc 1676 Viewpond Dr Se, Grand Rapids 49508 | (616) 827-4444 |
| Asap Security Llc 3508 Roger B Chaffee Mem Dr Se, Grand Rapids 49548 | (616) 301-8190 |
| Corporate Security Solutions 5612 Division Ave S, Grand Rapids 49548 | (616) 531-7930 |
| Crown Security Systems Inc 2207 Estelle Dr Se, Grand Rapids 49506 | (616) 452-7510 |
| D W Electronics 74 Market Ave Sw, Grand Rapids 49503 | (616) 534-5400 |
| Detection Systems & Engnrng 24 Weston St Sw, Grand Rapids 49503 | (616) 301-9000 |
| Identix Corp 1336 Mark St Ne, Grand Rapids 49525 | (616) 447-2626 |
| Vision Technology Intl 100 Grandville Ave Sw 202, Grand Rapids 49503 | (616) 233-9622 |
| Tri Tech Security 210 Front Ave Sw, Grand Rapids 49504 | (616) 224-7747 |
| Securalarm Systems 112 54th St Sw, Grand Rapids 49548 | (616) 257-7730 |
| Simplexgrinnell 2970 Walkent Dr Nw, Grand Rapids 49544 | (616) 784-7921 |
| Roetek Inc Grand Rapids 49546 | (616) 682-1997 |
| Pacom System 1822 Southampton Dr Se, Grand Rapids 49508 | (616) 248-9007 |