| Business | Phone |
| Entec Engine Corp 410 Trammell Dr, Alpharetta 30004 | (770) 475-5025 |
| Precistems Inc 8785 Glen Ferry Dr, Alpharetta 30022 | (770) 656-2403 |
| Granade Engineering Group 12345 Greenmont Walk, Alpharetta 30004 | (770) 663-8780 |
| Lsi Adapt Engineering 2001 Westside Pkwy # 190, Alpharetta 30004 | (678) 297-0972 |