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Collen is an engineering-led construction company with a legacy of excellence and a forward-thinking approach that positions it at the forefront of the construction industry across Ireland, the United Kingdom, and Europe. The company delivers high-quality, innovative solutions across a diverse range of sectors, underpinned by deep technical expertise and a culture of collaboration, precision and reliability.
With over 200 years of experience, Collen continues to grow as a dynamic, market-leading force in the construction industry. Its unique ability to combine engineering intelligence with project delivery excellence ensures the consistent delivery of complex and mission-critical projects.
Headquartered in Dublin, Collen also operates offices in the United Kingdom, Denmark and Sweden.
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Our Core Expertise
Engineering-Led Delivery
Collen's foundation as an engineering-led business brings deep technical insight and practical innovation to every project. This technical edge enables the delivery of efficient, sustainable and resilient solutions across all phases.
Sectors We Serve
Data Centres & Technology
Collen is a recognised leader in the delivery of hyperscale and co-location data centre projects across Ireland, the United Kingdom and wider Europe. The company’s end-to-end capabilities span civil, structural, architectural and MEP disciplines, delivering high-performance facilities that meet demanding standards for uptime, security and energy efficiency.
Public Works
Collen has a strong track record in delivering high-quality public infrastructure, including hospitals, education facilities and civic buildings. The approach prioritises stakeholder engagement, regulatory compliance and operational efficiency—creating sustainable, community-focused assets.
Energy
Supporting the energy transition, Collen delivers infrastructure aligned with sustainability goals. The company has in-house expertise in turnkey power stations, battery storage, photovoltaic installations and electricity network infrastructure. Collen is also advancing emerging sustainable power technologies and provides operation and maintenance services for energy generation facilities.
Life Sciences
In the pharmaceutical, medical device and biotechnology sectors, Collen delivers tailored solutions that meet stringent quality, safety and environmental standards. Projects include laboratories, cleanrooms and manufacturing facilities designed to support cutting-edge research and production.
Office Developments, Commercial Fit-Out and Decarbonisation
Collen delivers high-end commercial fit-outs and new builds that balance functionality, flexibility and aesthetics. Project teams work closely with clients and design partners to create workplaces that support productivity and innovation. The company is committed to reducing the carbon footprint of older building stock through smart energy reduction solutions, lowering life cycle costs and improving occupant comfort.
High-Density Residential & Hospitality
From luxury hotels to large-scale residential schemes, Collen delivers high-quality, design-led spaces that enhance urban living. The company’s understanding of complex urban environments ensures timely delivery and seamless integration with surrounding infrastructure.
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Geographic Reach
Ireland: Collen delivers projects across a wide range of construction sectors in both public and private domains, contributing to the sustainable development of the built environment.
United Kingdom and Europe: Internationally, Collen specialises in data centres and energy infrastructure, managing large-scale, mission-critical projects with precision and reliability.
Why Collen
Engineering Excellence: A technically skilled in-house team ensures robust, efficient and future-ready solutions.
Proven Track Record: Decades of experience delivering complex, strategically significant projects.
Client-Focused Delivery: A commitment to collaboration, transparency and performance.
Sustainability in Action: Driving decarbonisation and sustainable construction practices.
Pan-European Presence: International project delivery experience across diverse regulatory and cultural environments.