| Business | Phone |
| Honeywell 120 Ridgeview Center Dr, Duncan 29334 | (864) 433-0026 |
| Inergy Automotive Systems 961 Berry Shoals Rd, Duncan 29334 | (864) 968-9775 |
| Lear Corp 1825 E Main St, Duncan 29334 | (864) 433-1845 |
| Nett 1751 E Main St, Duncan 29334 | (864) 433-8427 |