• Captiva Software

• Card Commerce

• Career Trotter

• Careerwise

• Careworks

• Cased Dimensions Ltd

• casseo

• Caveo Information Systems Ltd

• Caveo Systems

• CCAS Limited

• CCI Executive Search (Charity Careers Ireland)

• CCI Recruitment

• CCKF Ltd

• CCP Recruitment

• CDL Technology

• Celtrino

• Centrecom systems

• Centrecom Systems Ltd

• Centrecom Systems Ltd

• Centric Health

• CertiVox

• Chartered Accountants Ireland

• Chase Resourcing

• Chennai Research Ltd.