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.
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.
2,500 Employees
Global Team
Over 2,500 individuals are employed across various countries, reflecting a commitment to diversity.
5th generation business
Family legacy
Spanning five generations, the company maintains its family roots while expanding its global footprint.
50 Nationalities
Diverse Workforce
Employees from nearly 50 different countries contribute to a rich cultural environment.