| Business | Phone |
| Electrosources 20221 Cedar Ln, Escondido 92029 | (760) 781-3762 |
| Facility Engineering Assoc 3551 Monte Real, Escondido 92029 | (760) 743-0555 |
| Advanced Signature Application 3366 Bernardo Ln, Escondido 92029 | (760) 737-5026 |
| Devenco Inc 1313 Simpson Way, Escondido 92029 | (760) 747-6750 |
| Marrs Svc Inc 101 State Pl, Escondido 92029 | (760) 233-7506 |
| Ralph Gonzales Consulting 310 State Pl, Escondido 92029 | (760) 739-9143 |
| Amc Consulting Inc 437 W Grand Ave, Escondido 92025 | (760) 738-8420 |
| Schiefler Consulting Svc 101 Khayyam Rd, Escondido 92025 | (760) 480-0563 |
| Schmit Engineering 1965 Rohn Rd, Escondido 92025 | (760) 743-0592 |
| Power Plus 508 W Mission Ave # 209, Escondido 92025 | (760) 781-3956 |
| Pinnacle Engineering Escondido 92025 | (760) 747-8950 |
| Parsley Consulting Engineers 350 W 9th Ave # L, Escondido 92025 | (760) 745-6181 |
| Multimedia Systems & Technlgy 1252 Tower Ln, Escondido 92026 | (760) 715-1472 |
| Lxt Group 325 Rock Ridge Pl, Escondido 92027 | (760) 489-5302 |