| Business | Phone |
| Outsource Group 1646 N California Blvd # 210, Walnut Creek 94596 | (925) 280-1200 |
| Payroll Systems 1820 Bonanza St # 200, Walnut Creek 94596 | (925) 939-6214 |
| Accu Pay Systems 3093 Citrus Cir # 115, Walnut Creek 94598 | (925) 945-1660 |
| Temp Services Po Box 5281, Walnut Creek 94596 | (925) 943-6163 |