| Business | Phone |
| R & R Gage Co 6669 Pchtree Ind Blvd G, Norcross 30092 | (770) 409-9801 |
| Analysts Inc 3075 Corners North Ct, Norcross 30071 | (770) 448-5235 |
| Forcon International Georgia 5500 Oakbrook Pkwy, Norcross 30093 | (770) 734-0097 |
| National Testing Laboratory 1890 Beaver Ridge Cir, Norcross 30071 | (770) 798-8000 |
| Atlantic Microlab 6180 Atlantic Blvd, Norcross 30071 | (770) 242-0082 |
| Kimley Horn & Assoc 3169 Holcomb Bridge Rd, Norcross 30071 | (770) 825-0744 |