| Business | Phone |
| Amec 1850 S Sepulveda Blvd # 205, Los Angeles 90025 | (310) 473-4383 |
| Cal-Pac Engineering Co Inc 2140 W Olympic Blvd, Los Angeles 90006 | (213) 387-3235 |
| Delphey-Gerdes Engineering Inc 3655 S Soto St, Los Angeles 90058 | (323) 581-2625 |
| Richard Garcia 2330 Westwood Blvd, Los Angeles 90064 | (310) 446-6262 |
| Jacobs Engineering Group Inc 660 S Figueroa St # 2020, Los Angeles 90017 | (714) 681-5478 |
| Malcolm Pirnie Inc 725 S Figueroa St, Los Angeles 90017 | (213) 614-9002 |
| Mollenhauer Group 601 S Figueroa St # 4, Los Angeles 90017 | (213) 624-2661 |
| Parsons Brinckerhoff 444 S Flower St, Los Angeles 90071 | (213) 362-9470 |
| Psomas 11444 W Olympic Blvd # 750, Los Angeles 90064 | (310) 954-3700 |
| Rba Partners Inc 3470 Wilshire Blvd # 900, Los Angeles 90010 | (213) 381-3400 |
| Samara & Assoc 9100 S Sepulveda Blvd # 115, Los Angeles 90045 | (310) 322-3535 |
| Seaboard Engineering Co 1100 S Beverly Dr # 201, Los Angeles 90035 | (310) 277-7337 |
| Soly Yamini & Assoc Inc 11669 Santa Monica Blvd # 207, Los Angeles 90025 | (310) 444-9980 |
| Sande Vasant Pe 3454 W 1st St, Los Angeles 90004 | (213) 386-8020 |
| Vca 3951 Medford St, Los Angeles 90063 | (323) 729-6098 |
| Danmour & Assoc 11730 Gateway Blvd, Los Angeles 90064 | (310) 478-1838 |
| Dreckmann & Assoc 2926 Tilden Ave, Los Angeles 90064 | (310) 478-3157 |
| Inland Cities Corp 1801 Avenue Of The Stars #1205, Los Angeles 90067 | (310) 277-7551 |
| J L Patterson & Assoc Inc Los Angeles 90071 | (213) 683-1022 |
| Kennedy-Jenks Consultants 707 Wilshire Blvd # 3280, Los Angeles 90017 | (213) 624-6180 |
| Precision Engineering Co Los Angeles 90028 | (323) 469-9881 |
| Rba Partners Inc 601 S Figueroa St # 4, Los Angeles 90017 | (213) 381-3400 |
| Vega Engineering 635 S Hillview Ave, Los Angeles 90022 | (562) 861-5333 |
| Dietrich & Assoc 546 Frontenac Ave, Los Angeles 90065 | (323) 225-1802 |