| Business | Phone |
| Zimmerman Technical Svc Inc 3595 Canton Rd A9 Pmb 271, Marietta 30066 | (770) 516-5902 |
| Us Army Core-Engineers 200 Cobb Pkwy N 404, Marietta 30062 | (678) 354-0084 |
| Envirosoft Engineering 3311 Stillbrook Pass, Marietta 30062 | (770) 579-1311 |
| Geosciences Engineering 109 Anderson St Se 105, Marietta 30060 | (770) 428-4070 |
| Global Environmental Solutions 2121 New Market Pkwy Se, Marietta 30067 | (770) 690-9552 |
| Simon Consulting Inc 5172 Sandlewood Ct, Marietta 30068 | (770) 587-2716 |
| Holley Consultants 4343 Shallowford Rd D3, Marietta 30062 | (770) 993-0809 |
| Industrial Environmental Systm 2850 Johnson Ferry Rd 100, Marietta 30062 | (770) 645-1421 |
| Resolve Environmental Engnrng 1444 Waterford Green Dr, Marietta 30068 | (770) 650-9990 |
| Levine-Fricke 1640 Powers Ferry Rd Se 22, Marietta 30067 | (770) 980-2577 |
| Ads Environmental Svc 2270 Northwest Pkwy Se 160, Marietta 30067 | (678) 627-0004 |
| American Containment Svc Inc 60 Covington Ave Ne, Marietta 30060 | (770) 427-9777 |
| Associated Engineering Inc 2999 Johnson Ferry Rd, Marietta 30062 | (770) 998-5511 |