| Business | Phone |
| Auburn Engineers Inc 132 N Gay St # 210, Auburn 36830 | (334) 826-8600 |
| Boiler Efficiency Institute 1705 Pumphrey Ave, Auburn 36832 | (334) 821-3095 |
| Hi Line Engineering 1826 Opelika Rd # A, Auburn 36830 | (334) 887-3297 |
| Cgc Consulting Svc 2026 Brenton Ln, Auburn 36830 | (334) 887-6451 |