| Business | Phone |
| David Li's Assoc 2446 San Gabriel Blvd # B, Rosemead 91770 | (626) 288-1216 |
| T & W Consulting Engineers 1168 San Gabriel Blvd # N, Rosemead 91770 | (626) 288-0708 |
| Peter Lee Engineering 8748 Valley Blvd # L, Rosemead 91770 | (626) 280-9000 |
| Roselund Engineering Co 8453 Yarrow St, Rosemead 91770 | (626) 573-2441 |