| Business | Phone |
| Autocam Corp 1511 George Brown Dr, Marshall 49068 | (269) 789-4000 |
| Eaton Corp 1101 W Hanover St, Marshall 49068 | (269) 781-2811 |
| Tenneco Inc 904 Industrial Rd, Marshall 49068 | (269) 781-1350 |
| Cellasto Plastics Industries 820 Industrial Rd, Marshall 49068 | (269) 781-2875 |