| Business | Phone |
| Land Marine Geotechnics 3388 Las Huertas Rd, Lafayette 94549 | (925) 299-0129 |
| Lundgren Engineering Cnsltnts 4036 Happy Valley Rd, Lafayette 94549 | (925) 283-0686 |
| S E Consulting Inc 3315 Stage Coach Dr, Lafayette 94549 | (925) 944-3378 |
| Taga Engineering Software Svc 1076 Carol Ln # 136, Lafayette 94549 | (925) 283-6765 |
| Landslide & Foundation Failure 3708 Mount Diablo Blvd, Lafayette 94549 | (925) 284-4208 |