| Business | Phone |
| Buck Engineering 1347 Harding Pl, Charlotte 28204 | (704) 334-4454 |
| Plant Engineering Magazine 879 Autumn Rain Ln, Charlotte 28209 | (704) 523-5466 |
| D S Engineering 1223 Fox Run Dr, Charlotte 28212 | (704) 532-5632 |
| Ge Energy Svc 2401 Whitehall Park Dr # 500, Charlotte 28273 | (704) 672-2130 |