Our team
Dave Kirwan
Dave Kirwan is Country Chair of Bord Gáis Energy and Managing Director of Centrica Power, shaping global power investment and accelerating the transition to a sustainable energy future.
He represents Bord Gáis Energy on Centrica’s leadership team and works closely with government and regulators to influence policy and drive change. Dave has held senior roles across Centrica, including Managing Director of Bord Gáis Energy.
He holds a BE in Electronics from UCD, an MBA and DBA from UCC, and is a Fellow of Engineers Ireland. Dave also serves on Ibec’s Executive Committee and Focus Ireland’s Philanthropy Council.
John Dalton
John Dalton is Country Manager and Director of Trading at Bord Gáis Energy, leading operations and driving the company’s vision for a greener, fairer future.
Since joining Centrica in 2012, John has held senior roles across Finance and Energy Markets, moving to Bord Gáis Energy in 2014 and becoming CFO in 2017. In that role, he shaped strategy and growth before transitioning to Director of Trading in 2023 to expand gas and power trading as the business moves toward net zero.
John is a Chartered Accountant with a Master’s in Financial Services and a member of the Association of Corporate Treasurers.
Catherine Lonergan
Catherine Lonergan is Director of Customer and Commercial at Bord Gáis Energy, where she leads customer experience, marketing, data, and commercial strategy to deliver end-to-end energy solutions, efficiency initiatives, and net zero services that support Ireland’s energy transition.
Since joining in 2024, Catherine has focused on driving innovative, data-driven solutions that enhance customer engagement and accelerate the shift to sustainable energy. Her career spans senior leadership roles, including Chief Commercial Officer at SaaS provider Toovio, Managing Director of Sales at Eir, and Head of Retention at Three, alongside running her own consultancy.
Catherine holds a BA in Business Studies and a Master’s in Marketing from DCU. She also serves on the boards of Bord Gáis Energy, Ardrar Limited, and the Asthma Society of Ireland.
Denis O’Sullivan
Denis O’Sullivan is Director of Development at Centrica Power, leading the implementation of the company’s investment and growth strategy across its European portfolio of conventional, renewable, nuclear and power storage assets. Denis joined Centrica in 2023 after senior leadership roles at Ervia, including Networks Managing Director and Chief Operating Officer.
With more than 20 years’ experience delivering major infrastructure projects, including Bord Gáis Energy’s wind portfolio ahead of its 2014 sale, current investments in Advanced Modular Reactors in the UK, and security-of-supply projects in Ireland, he has extensive expertise in energy policy and regulation at national and EU level and is advancing the adoption of new technologies for sustainable energy generation and storage. Denis holds an honours degree in Mechanical Engineering from MTU.
Martina Williamson
Martina Williamson is People Director at Bord Gáis Energy, shaping a high performance, inclusive culture to fuel growth and the energy transition.
Since joining in 2023, she has led people strategy, talent, and change programmes that redefine ways of working and accelerate organisational change to achieve business goals. Previously Head of HR for Citibank Europe Plc, she led teams across Europe, driving strategy, governance, and transformation at scale.
Martina holds a Master’s in International HR Management from Cranfield University, a Diploma in Creativity and Innovation from UCD, is a member of the Chartered Institute of Personnel and Development, Institute of Directors (IoD) and 30% Club.
