| Business | Phone |
| Brule' Engineering 4108 Cedar Dr, San Bernardino 92407 | (909) 886-3810 |
| Douglas Engineering 5655 Golondrina Dr, San Bernardino 92404 | (909) 886-5789 |
| National Equity Engineering Po Box 2146, San Bernardino 92406 | (909) 881-1547 |
| Northrop Grumman Mission Syst 1475 E Harry Shepard Blvd, San Bernardino 92408 | (909) 382-6234 |
| Dream Engineering Inc 2700 Little Mountain Dr # G105, San Bernardino 92405 | (909) 475-9900 |
| Ocelot Engineering 555 S H St, San Bernardino 92410 | (909) 884-0484 |
| Transit Engineering Co 2260 W Rialto Ave # 51, San Bernardino 92410 | (909) 888-1559 |
| George E Hawes Pro Engr 1254 S Waterman Ave, San Bernardino 92408 | (909) 386-0111 |