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Early engagement with us on large scale projects is a key element for success

Since our first forays into the Data Centre/ICT sector in the early 1980s, John Sisk & Son has had a continued, proven track record in delivering high-end, mission critical projects for domestic and multinational micro-electronics, data and ICT clients across Ireland and the UK.

Our commitment to delivering excellence and innovation has led us to a business model that is built on strong, long-lasting relationships where 70 per cent of our business stems from existing clients.


Multinational Data Centre Campus, Dublin, Ireland

Data Centre, Northern Sweden

Data Centre, Southern Sweden

Hewlett Packard

document cover

Irish Building Magazine December 2022

Donal McCarthy, COO, Sisk interview

Tánaiste Leo Varadkar visits Sisk data centre project in Denmark


AEC Autodesk Awards 2022

Innovator of the Year - LLA03 Data Centre

Sisk is implementing its DPD strategy from site mobilisation right through to final handover on all of its data centre projects

Other Data/ICT Case Studies

Worldport, Dublin, Ireland

IBM Data Suite 1: IBM Technology, Dublin, Ireland

IBM Data Suite 2: IBM Technology, Dublin, Ireland

Data Electronics, Dublin, Ireland


ACI Data Centre, Limerick

Dell, Limerick, Ireland

Contact us and see how we can work together

Image of Diarmuid O'Sullivan
Diarmuid O'Sullivan

Director - Data/ICT, Ireland & Europe

Diarmuid has over 28 years experience working with Sisk and is currently responsible for delivering mission critical Data Centre projects from pre-construction stage through to final commissioning and handover for large multinational clients.