| Business | Phone |
| Antrim Engineering & Constru 1228 Quarry Ln, Pleasanton 94566 | (925) 426-2444 |
| California Engineering Contr 20 Happy Valley Rd, Pleasanton 94566 | (925) 461-1500 |
| Cuddy General Engineering Pleasanton 94566 | (925) 426-5440 |
| Delta Group Engineering Inc 5627 Stoneridge Dr # 314, Pleasanton 94588 | (925) 416-7705 |
| Enclos Corp 6140 Stoneridge Mall Rd # 250, Pleasanton 94588 | (925) 467-1100 |
| Manito Construction Inc 1048 Serpentine Ln # 306, Pleasanton 94566 | (925) 600-0220 |
| Pacific Infra Structure 2134 Rheem Dr # C, Pleasanton 94588 | (925) 249-0011 |
| Profab Technology Inc 1233 Quarry Ln # 115, Pleasanton 94566 | (925) 600-0770 |
| Ripley Pacific Co 5820 Stoneridge Mall Rd # 100, Pleasanton 94588 | (925) 847-2086 |