Sisk has become the latest Irish firm to win main contractor work on the £1 billion Athletes Village.
Its UK arm John Sisk and Son was this morning unveiled as the builder for two blocks known as N9 and N10.
Developer Lend Lease is building five of the 11 plots that make up the village, and handing out the other six.
Belfast-based Ardmore won the right to build one, and Sisk has now scooped the deal to build two more.
Irish companies Bennett Construction and P Elliot are joined by Byrne Group on the shortlist for the contract for N14.
That leaves two blocks, which will be awarded under one contract later this year.