| Business | Phone |
| Boryn Engineering Co 4780 Birkdale Dr, Commerce Township 48382 | (248) 360-3717 |
| Dy-Tech Engineering 1910 Winner St, Commerce Township 48390 | (248) 960-9541 |
| Dynamic Associates Svc Inc 4488 Ravinewood Dr, Commerce Township 48382 | (248) 685-1501 |