| Carelon Employment Company, LLC | Carelon Employment Company, LLC | 220 Virginia Ave | |
| Central Staff Services Inc. | Central Staff Services Inc. | 620A Route 25A | |
| Century II Staffing, LLC | Century II Staffing, LLC | 9020 Overlook Blvd., Suite 201 | |
| CEOHR | CEOHR, Inc. | 4211 W. Boy Scout Blvd Suite 500 | |
| CheckMate Management Inc. | CheckMate Management Inc. | 414 Grand Ave; PO Box 4364 | |
| CheckMate Services Inc. | CheckMate Services Inc. | 414 Grand Ave. P.O. Box 4364 | |
| Clear Employer Services | Clear Employer Services | 2080 Cabot Blvd W, Suite 202 | clearemployerservices.com |
| CoAdvantage | CoAdvantage | 101 Riverfront Blvd, Suite 300 | coadvantage.com |
| Cohesive Networks 2, Inc. | Cohesive Networks 2, Inc. | 721 Emerson Suite 500 | |
| County Agency Inc. | County Agency Inc. | 129 South 8th Street | |
| County Staffing Inc | County Staffing Inc | 129 South 8th St. | |
| CPEhr / ModernHR | CPE HR Inc | 7590 N Glenoaks Blvd, Suite 200 | cpehr.com |
| CTMJ Inc. | CTMJ Inc. | 3014 US HWY 301 N., Suite 1000 | |
| Current HR LLC | Current HR LLC | 1717 Dixie Highway Suite 390 | |
