Engineered to exceed expectations

Greg is CEO and co-founder of Ethos, with more than 20 years’ experience leading engineering businesses and delivering complex projects across international markets.

A Chartered Engineer, Greg co-founded Ethos in 2005 and has helped grow the business into a multidisciplinary engineering consultancy working across data centre and energy infrastructure projects globally. He brings an engineer’s mindset to leadership, combining a strong understanding of client needs with a focus on performance, innovation and long-term growth.

Greg is a firm believer in continually improving how we work. He champions new technology, collaboration and the development of great people, creating the conditions for teams to perform at their best and deliver better outcomes for clients.

John is a founding member of Ethos and has extensive experience across engineering, business operations and organisational growth.

Originally an electrical engineer, John brings a strong technical understanding to the way Ethos operates and delivers for clients. He has played a central role in the growth of the business, helping to build the systems, processes and teams needed to support increasingly complex projects at scale.

John focuses on continuous improvement, combining strong operational fundamentals with new technology to make the way we work simpler and more effective. He is particularly interested in the potential of digitalisation, Lean principles and AI to improve project delivery and create better outcomes for clients and teams.

Colm is a founding member of Ethos, with more than 30 years’ experience across engineering, project delivery and commercial leadership.

With a background in Building Services Engineering, Colm brings a strong understanding of both the technical and commercial demands of complex projects. Since helping establish Ethos in 2005, he has played a key role in growing the business and building long-term relationships with clients across international markets.

Today, Colm leads Ethos’ commercial strategy, working closely with clients and teams to understand their priorities, strengthen partnerships and create the right conditions for successful project delivery.

Gary has more than 20 years’ experience in engineering and data centre design.

Having spent two decades with Ethos, including as Data Centre Director, Gary combines deep technical experience with a strong understanding of the clients, markets and opportunities shaping the sector. He has worked across complex data centre projects internationally, building long-term client relationships and helping teams respond to changing project and business needs.

As Chief Growth Officer, Gary leads Ethos’ growth strategy across new markets, sectors and services. He works closely with clients and teams to strengthen existing partnerships, develop new opportunities and build the capability needed to support clients as their requirements evolve.

Claire has extensive experience in financial leadership, business transformation and international growth.

Claire brings deep experience from complex global organisations, spanning financial control, business partnering, mergers and acquisitions and post-acquisition integration. She has led large international finance teams and supported major business units through periods of growth and change.

As CFO, Claire helps shape Ethos’ financial strategy and governance as the business continues to grow internationally. She is a member of the executive leadership team and Ethos’ ESG Committee, bringing financial insight to wider decisions around investment, risk, sustainability and long-term business performance.

Edwin has extensive experience in senior HR leadership, organisational development and business transformation.

Edwin has worked across PLC and multinational organisations, as well as advising businesses on organisational development and change. He brings a strong understanding of how leadership, culture, talent and organisational structure need to evolve together as businesses grow.

As CHRO, Edwin leads Ethos’ people strategy across its international operations, with a focus on attracting, developing and retaining high-performing teams. He works closely with the executive team to strengthen leadership capability, organisational structures and talent development, helping ensure Ethos has the people and culture needed to support its continued growth.

Derek has experience in engineering, data centre design and operational leadership.

Having previously led Ethos’ Data Centre team, Derek brings a strong understanding of complex project delivery and the operational demands of a growing engineering business. He works across teams to strengthen how projects are resourced, managed and delivered, helping maintain consistency and quality as Ethos continues to grow.

As Deputy Chief Operating Officer, Derek works closely with the wider leadership team to improve engineering delivery and operational performance. His practical, collaborative approach helps teams work effectively at scale while keeping client needs and successful project outcomes at the centre of delivery.

Susan has more than 30 years’ experience in building services engineering and project delivery.

Her experience spans complex projects across commercial, healthcare, residential, data centre, industrial and energy sectors. This broad background gives Susan a strong understanding of how different technical and operational requirements come together across a project.

As Client Partner, Susan leads Ethos’ Energy and Industrial team, working closely with clients to understand their priorities and support successful delivery. She brings cross-sector experience, technical insight and a collaborative approach to helping clients navigate increasingly complex and demanding projects.

Müge is Sustainability & ESG Partner at Ethos, with expertise in sustainability strategy, ESG, carbon management and sustainable digital infrastructure. She works with clients to turn sustainability goals into practical action, helping them reduce carbon, strengthen ESG performance and integrate sustainability into the way they design, operate and plan for the future.

Alongside her client work, Müge leads Ethos’ approach to sustainability and ESG. She chairs the Ethos ESG Committee and has led key initiatives including the company’s science-based climate targets, carbon reporting and EcoVadis Rating.

Müge is a contributing author to Greener Data Volume 3, where she writes about embodied carbon and sustainable data centre design, and regularly speaks on sustainability and embodied carbon. In 2026, she won the Best Sustainability Leadership Award at the Women in Construction Awards and was shortlisted for Sustainable Business Leader of the Year.

Stephen has extensive experience in engineering, design management and complex project delivery.

Having previously led Ethos’ Design Management function, Stephen brings a strong understanding of how multiple disciplines come together to deliver complex infrastructure. His experience is particularly valuable on live data centre projects, where upgrades need to be carefully planned around existing operations.

Stephen leads Ethos’ Data Centre Retrofit & Optimisation capability, helping clients increase capacity, strengthen resilience, improve energy performance and extend asset life. He combines strategic advice with practical engineering and delivery experience, helping clients modernise existing facilities while protecting uptime and long-term operational performance.

Paul has more than 20 years’ experience delivering large-scale engineering projects across international markets.

His experience spans data centres and a broad range of commercial and industrial projects, giving him a strong understanding of the technical, commercial and operational challenges clients face. Paul works closely with clients to understand their priorities, bring the right expertise together and support successful delivery from early strategy through to completion.

As Client Partner, Paul focuses on building strong, long-term relationships and helping clients navigate an industry that continues to evolve. He brings practical project experience, technical insight and a collaborative approach to every relationship.

John has more than 20 years’ experience delivering large-scale engineering projects.

He brings a strong technical background and a deep understanding of the challenges involved in planning and delivering complex data centre infrastructure. John works closely with clients and project teams to understand priorities, bring the right expertise together and support clear, informed decision-making throughout the project lifecycle.

As Client Partner, John focuses on building long-term relationships and helping clients respond to an evolving data centre market. He also plays an active role in Ethos’ innovation and R&D programme, connecting emerging technical thinking with practical solutions that can improve future project delivery.

Colin has extensive experience in engineering and the design and delivery of complex data centre infrastructure.

Having previously led Ethos’ Global Tech and Data Centre teams, Colin brings a strong understanding of both the technical challenges facing the sector and the changing needs of clients. His experience spans multidisciplinary engineering, resilient infrastructure and the impact of emerging technologies on data centre design.

As Client Partner, Colin works closely with clients to understand their long-term priorities and connect them with the right expertise across Ethos. He has a particular interest in how AI, energy constraints and sustainability are shaping digital infrastructure, helping clients turn these challenges into practical, future-ready engineering solutions.

James has extensive experience in the design and delivery of large-scale data centre projects across Ireland and Europe.

With a strong engineering background, James understands the technical and operational demands of complex mission-critical infrastructure. He works closely with clients and project teams to solve challenges early, coordinate the right expertise and maintain a clear focus on quality throughout delivery.

As Client Partner, James focuses on building long-term relationships and strengthening Ethos’ capability across European markets. He combines technical knowledge with a practical, collaborative approach, helping clients access the expertise and resources they need as projects and portfolios grow.