John Sisk & Son (Holdings) International Ltd

John Sisk & Son (Holdings) International Limited is a leading construction group that delivers pioneering solutions across a broad spectrum of sectors, including commercial, life-sciences, data-centre, infrastructure, residential and healthcare. With a strong focus on sustainability, Sisk builds the future by optimising material usage, streamlining resources and embedding environmental stewardship throughout every stage of a project's life-cycle. The company's recent work showcases its breadth: the landmark Dunkettle Interchange upgrade in Cork, the first two phases of Vantage Data Centres' DUB1 campus in Dublin, and the Plot 6 residential development in London's Silvertown district.

Operating across Ireland, the United Kingdom and Europe, Sisk combines cutting-edge construction methods with a people-first culture. Its core values of care, integrity and excellence underpin a commitment to safety, community wellbeing and the long-term health of the planet. In 2024 the group reported revenues exceeding €2.75 billion, with pre-tax profits rising 62 per cent, reflecting the strength of its sustainable, client-focused approach.