| Business | Phone |
| Jordan & Skala Engineers 10430 Harris Oak Blvd # L, Charlotte 28269 | (704) 599-4377 |
| American Roller Screw Inc 518 Griffith Rd, Charlotte 28217 | (704) 527-9777 |
| Bnr Engineering Assoc 5820 E Wt Harris Blvd, Charlotte 28215 | (704) 566-1331 |
| Bruce William Assoc 8501 Tower Point Dr, Charlotte 28227 | (704) 846-2327 |
| Summit Engineering 12700 Ivey Creek Dr, Charlotte 28273 | (704) 504-1717 |
| Cowley Engineering 12911 Low Meadow Ct, Charlotte 28277 | (704) 814-7096 |
| Harrell Mantai & Hopper 4731 Hedgemore Dr, Charlotte 28209 | (704) 527-1212 |
| Hdr Engineering Inc 128 S Tryon St # 1400, Charlotte 28202 | (704) 338-6700 |