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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 2,700 people in Ireland across five sites in Ballydine, Co Tipperary, Brinny, Co Cork, Carlow, Meath and Dublin. With our commitment to Inventing for Life firmly in mind, MSD, and in particular our Irish sites, make products that touch the lives of many patients across the country each day. 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. Our 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 our immuno-oncology medicine.

Financial Data

  • 31st Dec 20 Source: Company
    • €13.8 billion turnover
    • 2,700 employees
  • 31st Dec 19 Source: Company
    • €11.9 billion turnover
    • 2,500 employees


By Turnover

(€13.8 billion)

By Employees

12th in Top Companies By Turnover
  • 2,700
  • €13.8 billion


  • Mairead McCaul Country Manager

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