| Business | Phone |
| Anenson Engineering 1642 N Texas St # D, Fairfield 94533 | (707) 688-6875 |
| Hudson General Engineering 423 Gregory Ln # 41, Fairfield 94533 | (707) 315-0805 |
| Keller Engineering 4375 Tolenas Rd, Fairfield 94533 | (707) 421-1515 |
| Lawler & Stanz Inc 1229 Western St # 8, Fairfield 94533 | (707) 429-5458 |
| Legg Inc 530 Union Ave, Fairfield 94533 | (925) 605-4500 |
| Rockett Construction Co Fairfield 94533 | (707) 434-1309 |
| Specialty Engineering Inc 4159 Rowland Dr, Fairfield 94533 | (707) 426-9801 |