| Business | Phone |
| Data 2 1470 Enea Cir # 1550, Concord 94520 | (925) 603-7575 |
| Protect Emergency Response 3975 Industrial Way # A, Concord 94520 | (925) 671-0949 |
| Siemens Corp 4040 Nelson Ave, Concord 94520 | (925) 246-8200 |
| Stedim 1910 Mark Ct # 110, Concord 94520 | (925) 689-6650 |
| Wep Co 1930 Gilly Ln, Concord 94518 | (925) 906-8585 |
| Better Hands 1802 Wildbrook Ct # D, Concord 94521 | (925) 825-2349 |
| Cerus Corp 2411 Stanwell Dr, Concord 94520 | (925) 288-6000 |