| Business | Phone |
| Anglin Engineering 4941 Conger Dr, St Louis 63128 | (314) 487-2959 |
| Ssm Clinica Engineering Svc 7980 Clayton Rd, St Louis 63117 | (314) 644-7380 |
| Hdr Engineering Inc 2 Cityplace Dr, St Louis 63141 | (314) 812-2540 |
| Financial Engineering Ctr 1215 Fern Ridge Pkwy, St Louis 63141 | (314) 275-9090 |
| Engineered Construction 1154 Reco Ave, St Louis 63126 | (314) 835-0016 |