| Business | Phone |
| J Marc Engineering & Sales 29445 Beck Rd A201, Wixom 48393 | (248) 735-1580 |
| Elcore Inc 53165 Maranatha Ln, Wixom 48393 | (248) 486-1552 |
| Engineering Solid Solutions 47451 Avante Dr, Wixom 48393 | (248) 735-0403 |
| Earth Work Engineers Inc 51800 Pontiac Trl, Wixom 48393 | (248) 437-1731 |