The company was established in 1859 by John Sisk, marking the beginning of its journey from a local plastering business to a global construction giant.
Multi‑billion‑euro turnover
Financial performance
The company achieves significant revenue annually, reflecting its scale and success in managing large and complex projects.
€2.5 billion contracts
Project value
The company manages contracts worth up to €2.5 billion, demonstrating its capacity to handle major infrastructure and construction projects.
5th generation business
Family legacy
Spanning five generations, the company maintains its family roots while expanding its global footprint.
Culture + Values
Environment + Sustainability
19% CO2 Reduction
Carbon Emission Reduction
Achieved a 19% reduction in carbon emissions compared to the 2019 baseline in 2020.
70% Carbon Savings
Low-Carbon Concrete Savings
Innovative low-carbon concrete solution reduces carbon emissions by 70% compared to traditional methods.
1.17M Trees Planted
Tree Planting Achievement
Over 1.17 million trees planted since 2021, contributing to reforestation efforts.
97.7% Waste Diversion
Construction Waste Management
97.7% of construction and demolition waste diverted from landfill, promoting circular economy practices.
Inclusion & Diversity
50 Nationalities
Diverse Workforce
Employees from nearly 50 different countries contribute to a rich cultural environment.
2,500 Employees
Global Team
Over 2,500 individuals are employed across various countries, reflecting a commitment to diversity.
