• D.I.D Electrical
• DB Schenker Ireland
• DV8 Fashion
• Dairygold
• Dalata Hotel Group
• Dara Community Living
• Datalex plc
• Davy

• Dawn Farm Foods
• Delmec Engineering Ltd
• Deloitte
• Derrycourt Cleaning Specialists
• Design Build Search
• Diageo plc
• Diamond Coast Hotel
• Digital Arbitrage, Inc

• Direct Medics Healthcare Recruitment
• Direct Wholesale Kitchens
• Donnybrook Fair
• Dornan
• Down Syndrome Ireland
• Doyle Shipping Group
• Dropbox, Inc.
• Druids Glen Hotel & Golf Resort

• Dublin City University
• Dublin Coach Quality Transport
• Duffy Alexander Recruitment Ltd
• Dun & Bradstreet, Inc
• Dundalk Institute Of Technology
• Dunnes Stores
• Dylan Hotel Dublin
• daa plc