| Business | Phone |
| Waltonen Engineering 31330 Mound Rd, Warren 48092 | (586) 274-2300 |
| B N Engineering & Assoc Co 24660 Beierman Ave, Warren 48091 | (586) 757-3534 |
| Strategic Design Svc Llc 3614 E 12 Mile Rd, Warren 48092 | (586) 576-5502 |
| Braad Controls Inc 14734 Masonic Blvd, Warren 48088 | (586) 254-7385 |
| Spectrum Engineering Solutions 26012 Mound Rd, Warren 48091 | (586) 754-8400 |
| Ruecker Engineering Ltd Warren 48093 | (586) 573-0616 |
| Controls Design Inc 24280 Ryan Rd, Warren 48091 | (586) 759-0108 |
| Rda Engineering Inc 28517 Lorna Ave, Warren 48092 | (586) 574-3022 |
| Production Modeling Inc 8150 E 13 Mile Rd 150, Warren 48093 | (586) 576-0810 |
| Decisive Technology Ltd 30100 Ryan Rd, Warren 48092 | (586) 751-0606 |
| Petersen Consulting Llc 24050 Gibson Dr, Warren 48089 | (586) 757-0776 |
| Doering Design Svc Inc 8246 E 12 Mile Rd, Warren 48093 | (586) 751-1003 |
| Elsas Engineering 27192 Dequindre Rd, Warren 48092 | (586) 582-0094 |
| Msx Intl World Headquarters 1950 Concept Dr, Warren 48091 | (586) 758-0300 |
| Hamlett Engineering Sales Co 28838 Van Dyke Ave, Warren 48093 | (586) 558-8380 |
| Land Engineering Svc Inc 2201 E 12 Mile Rd, Warren 48092 | (586) 582-9800 |