| Business | Phone |
| Ficcadenti & Waggoner Consltng 3100 Oak Rd # 390, Walnut Creek 94597 | (925) 280-0098 |
| H Robert Hammill Pe 2613 Saklan Indian Dr, Walnut Creek 94595 | (925) 939-5424 |
| Mba Structural Engineers 1717 N California Blvd # 2a, Walnut Creek 94596 | (925) 933-4450 |
| Structural Solutions Inc 150 N Wiget Ln, Walnut Creek 94598 | (925) 938-3303 |
| Alex Le Structural Engineering Walnut Creek 94596 | (925) 287-8370 |
| Ficcadenti Waggoner & Castle 3100 Oak Rd # 390, Walnut Creek 94597 | (925) 280-0098 |