| Business | Phone |
| William Floyd & Co 2820 Lassiter Rd B200, Marietta 30062 | (770) 993-0531 |
| Civil Engineering Consultants 1225 Johnson Ferry Rd 855, Marietta 30068 | (770) 977-5747 |
| Engineering Strategies Inc 1337 Canton Rd B, Marietta 30066 | (770) 429-0001 |
| Gaskins Surveying & Engrng Co 1266 Powder Springs Rd Sw, Marietta 30064 | (770) 424-7168 |
| Harris Consultants Inc 3513 Nantucket Dr, Marietta 30068 | (770) 977-8701 |
| Hdr/Wl Jorden Inc 200 Cobb Pkwy N 134, Marietta 30062 | (770) 795-8476 |
| Sdg Engineering 793 Fox Hollow Pkwy, Marietta 30068 | (678) 560-4161 |
| Horizon Engineering Inc 1395 S Marietta Pkwy Se 300, Marietta 30067 | (678) 354-4622 |
| Matrix Development 1800 Parkway Pl Se, Marietta 30067 | (678) 766-0911 |
| Krewson Vickrey 1337 Canton Rd A, Marietta 30066 | (770) 421-8953 |
| A & R Engineering 2160 Kingston Ct Se O, Marietta 30067 | (770) 690-9255 |
| American Engineers Inc 1634 White Cir 101, Marietta 30066 | (770) 421-8422 |
| Braswell Engineering 3225 Shallowford Rd, Marietta 30062 | (770) 565-0035 |