| Business | Phone |
| Process Automation Engineering 1666 E Lincoln Ave, Madison Heights 48071 | (248) 547-6880 |
| Adt Security Svc Inc 1400 E Avis Dr, Madison Heights 48071 | (248) 583-0182 |
| Argus Security Tech Inc 25760 John R Rd, Madison Heights 48071 | (248) 398-9888 |