| Business | Phone |
| Kappa Engineers Inc 1210 E 223rd St # 301, Carson 90745 | (310) 233-3800 |
| Robert Brown Assoc 500 E Carson Plaza Dr # 215, Carson 90746 | (310) 329-5697 |
| Western Analysis Engineering 727 E 223rd St, Carson 90745 | (310) 513-1233 |
| Cdi Engineering Solutions 23188 Colony Park Dr, Carson 90745 | (310) 835-4267 |
| Jfq & Assoc 18903 Avalon Blvd, Carson 90746 | (310) 516-8327 |