| Business | Phone |
| Engineered Mechanical Svc Inc 2235 Enterprise St, Escondido 92029 | (760) 233-5055 |
| General Physics Corp 12430 Vineyard Ave # 103, Escondido 92029 | (760) 233-9880 |
| O'Hara Consulting Svc 1040 S Andreasen Dr, Escondido 92029 | (760) 739-8942 |
| Tekton Industries 300 Enterprise St # F, Escondido 92029 | (760) 431-7511 |