| Business | Phone |
| Alper Audi Inc 1804 Borman Circle Dr, St Louis 63146 | (314) 432-8600 |
| Structures Unlimited Inc 8615 Gravois Rd, St Louis 63123 | (314) 638-6650 |
| Mc Nealy-Bumberry Engineering 745 Craig Rd # 304, St Louis 63141 | (314) 997-7310 |
| Kpff Consulting Engineers 1610 Des Peres Rd # 100, St Louis 63131 | (314) 275-3777 |
| Ibrahim Engineering Corp 11500 Olive Blvd # 200, St Louis 63141 | (314) 567-0196 |