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John Sisk & Sons


John Sisk & Son is a fifth generation family business, founded in Ireland in 1859 and has grown from a small local builder to an international construction company, now part of the strong and diversified Sisk Group.

As a large employer with a broad geographical footprint, John Sisk and Son’s operations interact with many communities. It recognises that active engagement in social progress, environmental protection and economic balance is necessary for long term development and is committed to the principle of sustainability.

Energy & Carbon
Sustainability and Supply Chain

Our focus for continuous improvement in sustainability includes the integration of sustainability across all business functions, engagement of the Supply Chain, guidance development and overall performance improvement.

As a business we are fully committed to responsible energy management, with an aim to continually reduce our carbon footprint and reach a state of Zero energy waste through improved energy efficiency performance. In line with this John Sisk & Son are ISO 50001 certified as well as to the ISO 14001, ISO 9001 and OHSAS 18001 standards.

“As Sisk continues on its sustainability journey, becoming a member of the Supply Chain Sustainability School offers us the next step in developing and implementing our strategy and plans. In collaboration with our supply chain partners and existing members of the school, we welcome the opportunity of being part of a movement that is ultimately leading to the betterment of the industry with benefit to our customers, our suppliers, our own staff and wider society. We very much look forward to supporting and working with the school.”
Brian Handcock, Head of Sustainability