| Business | Phone |
| 3 Rock Consulting 505 Pyramid Ct, Fairfield 94534 | (707) 208-4552 |
| Alpha 7 Consulting Svc Fairfield 94533 | (707) 428-3334 |
| Gilbert-Morad Engineering 710 Jackson St, Fairfield 94533 | (707) 429-2699 |
| Hra Consulting Engineers Fairfield 94533 | (707) 421-1400 |
| Ictex Fairfield 94533 | (707) 434-8555 |
| Lowney Associates 2850 Cordelia Rd, Fairfield 94534 | (707) 423-2523 |
| Resource Management Assoc 4171 Suisun Valley Rd # J, Fairfield 94534 | (707) 864-2950 |
| Urs Corp 2329 N Texas St, Fairfield 94533 | (707) 429-4738 |