| Business | Phone |
| Central Pipe Mechanical 385 E Commercial Ave, El Centro 92243 | (760) 353-8344 |
| Siemers Engineering Inc 803 E Main St, El Centro 92243 | (760) 337-8300 |
| A R Utility Specialist Inc Naval Air Facility, El Centro 92243 | (760) 353-4777 |
| Legend Engineering Po Box 326, El Centro 92244 | (760) 455-0094 |