| Business | Phone |
| Brice Engineering 1250 S Wilson Way, Stockton 95205 | (209) 464-7218 |
| Electronic Engineering Times Stockton 95207 | (209) 474-8255 |
| Ingalls Power Products 1112 White Ln, Stockton 95215 | (209) 931-8362 |
| Mark 3 Engineering 2626 West Ln, Stockton 95205 | (209) 463-1354 |
| Mtc Engineering Office 4221 E Mariposa Rd, Stockton 95215 | (209) 948-2440 |
| Specialized Engineering 1325 El Pinal Dr, Stockton 95205 | (209) 462-0276 |
| Traffic Engineering Svc 7624 Woodside Dr, Stockton 95207 | (209) 478-2300 |
| Mk Centennial Civil Engineers 5000 S Airport Way, Stockton 95206 | (209) 983-0397 |