We are proud to have published our 2025 Sustainability Report. This is not just a snapshot of initiatives from last year, it is an evidence-based record of how Sustainability is helping Sisk to win work, deliver complex projects, manage risk and grow our business, supported by a refreshed Sustainability Roadmap.
Our staff, supply chain partners, clients, communities, and other key stakeholders play a vital role in helping us deliver our sustainability ambitions.
As Ireland’s largest contractor, and with a growing reputation in the UK and Europe, Sisk has as important role to play in leading change within the industry.
In 2025, our commitment to delivering excellence was reflected in a formidable year of project wins and progress. Our teams delivered a wide range of projects that reflected steady progress towards more sustainable solutions.
We expanded our 'zero plastic to landfill' ambition across more of our operations and strengthened circular practices on sites. Our low‑carbon concrete demonstrator programme expanded from the UK into Ireland, supporting the transition of emerging technologies from testing to practical application.
We achieved a 24% reduction in absolute Scope 1 and Scope 2 GHG emissions compared to our baseline year and maintained our CDP A rating for the second consecutive year. Our efforts were recognised externally through a range of awards, including ‘Employer of the Year’ with the Considerate Constructors Scheme (CCS), ‘Best Sustainability Initiative’ at the National Property Awards, and ‘Partnership with a Social Enterprise’ and ‘Diversity and Inclusion’ at the Chambers Ireland Sustainable Business Impact Awards, among others.
In 2025, we were very proud to become an Irish SDG Champion, just one of twenty companies, reflecting our commitment to contributing beyond our own organisation and playing an active role in advancing national progress on the global Sustainable Development Goals. Equally important has been our continued focus on people and responsible business practices.
As regulatory expectations continue to evolve, we continue to prepare for the Corporate Sustainability Reporting Directive (CSRD). This year’s work has strengthened our data, governance and controls, supporting both compliance and improved decision‑making. The insights gained through our preparations have directly informed the refinement of our Sustainability Roadmap and our focus for the second half of this decade.
Our contribution as a business is clear: to deliver essential infrastructure and buildings in a way that supports a low‑carbon future, upholds human rights, protects wellbeing, and creates lasting value.
Download here: Sisk Sustainability Report 2025