| Business | Phone |
| Stevenson & Palmer Engineering 2430 Herodian Way Se 101, Smyrna 30080 | (770) 952-2481 |
| R K Shah & Assoc Inc 1280 Winchester Pkwy Se, Smyrna 30080 | (770) 436-5070 |
| Pwh Engineering 3583 S Cobb Dr Se, Smyrna 30080 | (770) 433-8190 |
| Mc Crary Engineering Inc 1190 Winchester Pkwy Se 210, Smyrna 30080 | (770) 431-8431 |