| Business | Phone |
| Advantage Control Systems 27 Airport Dr, Rockford 61109 | (815) 397-3170 |
| Technical Facilty Solutions Rockford 61104 | (815) 316-8721 |
| Siesco 6656 Old River Rd, Rockford 61103 | (815) 633-8998 |
| Jay Tronics Inc 124 N Rockton Ave, Rockford 61103 | (815) 965-8786 |