| Business | Phone |
| Asca Inc 1720 S Catalina Ave # 220, Redondo Beach 90277 | (310) 265-1690 |
| Data Spectrum Inc 2615 Manhattan Beach Blvd, Redondo Beach 90278 | (310) 643-0040 |
| Kushner Associates 2627 Manhattan Beach Blvd #204, Redondo Beach 90278 | (310) 643-4343 |
| Avicon 724 Elvira Ave # B, Redondo Beach 90277 | (310) 567-7468 |
| Belmar Engineering & Mgmt 1650 S Pacific Coast Hwy # 301, Redondo Beach 90277 | (310) 316-5934 |
| Salem Corp 420 Esplanade # 12, Redondo Beach 90277 | (310) 316-3433 |
| Surtreat Llc 700 N Pacific Coast Hwy, Redondo Beach 90277 | (310) 374-4030 |
| Innovative Engineering/Design 18408 Mansel Ave # A, Redondo Beach 90278 | (310) 542-7642 |
| Progesssive Engineering 2011 Morgan Ln, Redondo Beach 90278 | (805) 541-0511 |