Microsoft is to create up to 400 construction jobs with a major new investment in Leopardstown in Dublin.
The technology giant is investing €170m in a new data centre in the city.
The centre will be used to support the company's services on the likes of Windows Messenger and Xbox Live.
Cathriona Hallahan of Microsoft Ireland said the investment proves how important the country is to the tech giant.
"The Irish leadership team here are very proud of the fact that we spend a lot of time lobbying about why Ireland is a great place to invest," she said.
"And the fact that we can pull all the unique assets that we have here across the site together to prove to the company that Ireland continues to be a place where we should invest and that we can scale and grow."