We are John Sisk & Son (Sisk), a fifth generation, family owned construction and engineering business founded in 1859 by John Sisk in Cork, Ireland. The Sisk name embodies everything we value: our heritage, reputation, quality of work and commitment to the future. It reflects our people, how we collaborate, and how we engage with our partners and clients; it is our ethos, purpose and core values.

Now operating as an international business across the UK, Ireland and mainland Europe, we employ over 2,000 people and bring the scale, capability and resilience required to deliver complex, multidisciplinary programmes. Our history spans three centuries, underpinned by a long term mindset that enables sustained investment in our people, innovation and relationships.

For more than 160 years, we have built a strong reputation for ‘Building Excellence’, delivering iconic and technically demanding projects across commercial, healthcare, life sciences, data centres, infrastructure, transportation, residential and public sector environments. We continuously explore better ways of doing things, driven by innovation, collaboration and continuous improvement.

Our Vision is to be at the heart of change, shaping a more sustainable, resilient and progressive built environment.
Our Mission is to continuously embrace innovative ways of Building Excellence that deliver powerful results for all stakeholders, including our clients, supply chain partners, communities and people.

In the UK, our regional presence enables us to combine national capability with local delivery expertise. Supported by robust governance, digital enabled delivery and a whole life approach, we consistently provide safe, high quality and sustainable outcomes that deliver long term value for our clients.