| Business | Phone |
| Teledyne Aircraft Products 2965 Wendy Ln, Marietta 30062 | (770) 977-1008 |
| Orion Aerospace 1165 Allgood Rd, Marietta 30062 | (678) 560-2953 |
| Northrop Grumman Corp 1895 Cunningham Rd Sw, Marietta 30008 | (770) 955-0630 |
| Aero Products 1732 Powers Ferry Rd Se, Marietta 30067 | (770) 953-1193 |