| Business | Phone |
| Mason L Brown & Assoc 1334 Wheaton Dr, Troy 48083 | (248) 435-9750 |
| Altair Engineering 1820 E Big Beaver Rd, Troy 48083 | (248) 614-2400 |
| Cadence Innovation 1940 Barrett Dr, Troy 48084 | (248) 269-8981 |
| Peter Basso Assocs 5145 Livernois Rd 100, Troy 48098 | (248) 879-6094 |
| Deneb Robotics 1120 E Long Lake Rd, Troy 48085 | (248) 689-7763 |
| Hms Mfg Co 1230 E Big Beaver Rd, Troy 48083 | (248) 689-0665 |
| Dehavilland Engineering Llc 2935 Binbrooke Dr, Troy 48084 | (248) 290-0229 |
| Custom Design Of Royal Oak 2741 John R Rd, Troy 48083 | (248) 740-1516 |
| Emrc Engineering 1607 E Big Beaver Rd, Troy 48083 | (248) 689-6228 |
| General Physics Corp 2800 Livernois Rd 130, Troy 48083 | (248) 526-5500 |
| Tdm Intl 2653 Industrial Row Dr, Troy 48084 | (248) 288-2150 |