| Business | Phone |
| Trc Intl Ltd 217 Ward Cir, Brentwood 37027 | (615) 661-7979 |
| Skyhook Structural Engineering 7003 Chadwick Dr, Brentwood 37027 | (615) 777-0097 |
| Skyhook Structural Engineering 7101 Executive Ctr Dr # 288, Brentwood 37027 | (615) 777-0097 |
| Flostor Engineering 216 Centerview Dr, Brentwood 37027 | (615) 373-9567 |