| Business | Phone |
| Idi Temps 918 N Central Ave, Upland 91786 | (909) 949-2300 |
| Kelly Services Inc 818 N Mountain Ave # 120, Upland 91786 | (909) 946-5811 |
| Olympic Staffing Svc Inc 1365 W Foothill Blvd # 3, Upland 91786 | (909) 985-2389 |
| Volt Services Group 876 N Mountain Ave # 101, Upland 91786 | (909) 985-0377 |