| Business | Phone |
| Atec Assoc Inc 160 Stanley Ct # C, Lawrenceville 30045 | (770) 682-8872 |
| Columbia Engineering 289 S Culver St, Lawrenceville 30045 | (770) 339-8273 |
| Engineering Management 303 Swanson Dr, Lawrenceville 30043 | (770) 962-8010 |
| Edward C Haight Pe 473 Cricket Ridge Ct, Lawrenceville 30044 | (770) 979-6650 |
| Haines Gipson & Assoc Inc 1550 N Brown Rd, Lawrenceville 30043 | (770) 491-7550 |
| Piedmont Design Group Inc 162 E Crogan St, Lawrenceville 30045 | (678) 425-0510 |
| Landworks Associates Inc 1509 Atkinson Rd, Lawrenceville 30043 | (770) 513-7100 |