• C&C Group
• C&D Foods
• CGI
• CRH
• CWS - Church World Service
• Cadence Design Systems, Inc
• Callinan Coaches
• Cambridge Education Group
• Canada Life - Canada Life Assurance Company
• Care Network Ireland
• Career Change
• Career Steps
• Career Vision Recruiters

• Carton House Hotel, Golf & Spa Resort - Pyramid Hotel Group
• Caulfield Transport Ltd
• Centra
• Centum Engineering
• Chadwicks Group
• Chanel Ireland
• Chez Max
• Choice Hotels International
• Choice People (Facilitas Group)
• Choice Stores
• Circet
• Circit
• Circle K - Circle K Ireland Holding Limited

• Circle Voluntary Housing Association - Circle VHA
• City Education Group
• Clancy Construction
• Clarecare
• Clayton Hotel Charlemont (Dalata Hotel Group plc.)
• Clifden Recruitment
• Cliff
• Colgate Palmolive
• Colin Burke Electrical
• CollierBroderick Management Consultants
• Combilift Material Handling Solutions
• Comer Homes Group
• Comfort Home Care

• Comfort Keepers Homecare
• Connected Health
• Connected Health - (Life Science Recruitment Ltd)
• Conscia Training
• Cope Galway
• Costcutter
• Covalen Solutions (PCL Group)
• Crewlink
• Cross Agricultural Engineering
• Crowne Plaza Hotels Ireland - Tifco Ltd
• Cunningham Contracts
• Curam Care Homes
• Currys