Name
 | URL | Country
| Market Cap (US$)
|
|---|
| Cornerstone International Group | http://www.cornerstone-group.com | United States | Private |
| Corporate Projects Resources, Inc. | http://www.cpri.com/ | United States | Private |
| Costello O'Hara, Inc. | http://costello-ohara.com/ | United States | Private |
| Coulter Partners | http://www.coultpartners.com | United States | Private |
| CPI, The Human Resources Solutions Company | http://www.cpipartners.com/ | United States | Private |
| Crist Associates | http://www.cristassociates.com/ | United States | Private |
| Cromwell Partners, Inc. | http://www.cromwell-partners.com/ | United States | Private |
| Crowe-Innes & Associates, LLC | http://www.croweinnes.com/ | United States | Private |
| Crown Advisors, Inc. | http://www.crownsearch.com/ | United States | Private |
| CTPartners | http://www.ctnet.com/ | United States | Private |
| CTR Corporation | http://www.ctrc.com/ | United States | Private |
| Curran Partners, Inc. | http://www.curranpartners.com | United States | Private |
| D. E. Foster Partners, Inc. | http://www.fosterpartners.com/ | United States | Private |
| D.P. Parker & Associates | http://www.dpparker.com/ | United States | Private |
| Dahl-Morrow International | http://www.dahl-morrowintl.com/ | United States | Private |
| Davidson Personnel, Inc. | http://www.davidsonstaffing.com/ | United States | Private |
| Development Dimensions International | http://www.ddiworld.com/ | United States | Private |
| Dise & Company | http://www.diseco.com/ | United States | Private |
| Diversified Search, Inc. | http://www.diversifiedsearch.com | United States | Private |
| Dixon Odom PLLC | http://www.dixonodom.com/ | United States | Private |
|
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