| Business | Phone |
| Broady Structural Engineering 26452 Stratford, Lake Forest 92630 | (949) 583-0620 |
| Orion Engineering 22365 El Toro Rd, Lake Forest 92630 | (714) 649-3207 |
| Power Structural Engineers Lake Forest 92630 | (949) 770-2723 |
| Scott Wallace Structural Engnr 22706 Aspan St # 402, Lake Forest 92630 | (949) 455-9875 |
| Shimaji & Lascola Inc 23682 Birtcher Dr, Lake Forest 92630 | (949) 770-9967 |
| Stb Structural Engineers Inc 21084 Bake Pkwy # 100, Lake Forest 92630 | (949) 599-0320 |