- context recruitment
- Contour Recruitment
- Contractor Collective
- Convex Solutions
- Cooksey Jones Limited
- Copper Koala
- Core-Asset Consulting Ltd
- COREcruitment
- Cornerstone Project Source Ltd
- Cornerstone Resourcing
- Cornucopia ITR
- Corporate Project Solutions
- Corus Consultancy
- COS Recruitment
- Cotech Recruitment
