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MSD Ireland is one of the country’s leading healthcare companies, having first established here over 50 years ago. MSD, known as Merck & Co. Inc., Kenilworth, NJ, USA in the US and Canada, has operations in more than 140 countries and employs over 2,800 people in Ireland across five sites in Ballydine, Co Tipperary, Brinny, Co Cork, Carlow, Meath and Dublin. MSD’s Irish sites manufacture approximately half of the company’s top twenty products, saving and enhancing lives in over sixty countries around the world. Its extensive Human Health portfolio includes a comprehensive vaccines portfolio for every stage of life as well as innovative solutions and treatments in areas such as oncology, where MSD Ireland plays a key role in the manufacture and supply of immuno-oncology medicine.

Financial Data

  • 31st Dec 21 Source: Company
    • €10.2 billion turnover
    • 2,800 employees
  • 31st Dec 20 Source: Company
    • €13.8 billion turnover
    • 2,700 employees


By Turnover

(€10.2 billion)

By Employees

12th in Top Companies By Turnover
  • 2,800
  • €10.2 billion


  • Mairead McCaul Country Manager

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