Skip to Content

ESB Executive Team

There are 10 members on the ESB Executive Team with responsibility for the day-to-day operations of the ESB Group.

Paddy Hayes Chief Executive

Paddy Hayes was appointed Chief Executive in August 2021. Prior to this, he headed up two of ESB’s main operating divisions as Executive Director of ESB’s Generation & Wholesale Markets business and then as Managing Director of ESB Networks. A Chartered Engineer, he holds a master’s degree in engineering from University College Dublin and an MBA from the University of Warwick. Paddy worked with British Steel in the UK before moving to the energy sector in 1999, to lead the Synergen joint venture between ESB and Statoil.

Jerry O’Sullivan Jerry O’Sullivan Deputy Chief Executive

Jerry O’Sullivan was appointed ESB Deputy Chief Executive in October 2014. Prior to this, he was Managing Director ESB Networks Ltd. Jerry was appointed Chairman of ESBN DAC in 2010. He joined ESB in 1981 and held a number of positions in Power Station Construction, Distribution and Transmission, Retail, Contracting, Marketing and Customer Service. He was appointed Head of Network Services in 2002 and Head of Sustainability and Network Systems in 2008. He holds a degree in Civil Engineering from University College Cork, is a fellow of Engineers Ireland and a member of the UCD Energy Institute Advisory board.

Jim Dollard Jim Dollard Executive Director Generation & Trading

Jim Dollard was appointed to the position of Executive Director, Generation & Trading in May 2018. Prior to this he held the position of Executive Director for Business Service Centre (BSC) and Electric Ireland.  Jim was previously the General Manager of Electric Ireland. An accountant, he began his career in ESB in 1992 and has held a number of senior management positions throughout the Group including Acting Group Financial Controller and Financial Controller ESB Energy International.

Pat Fenlon Pat Fenlon Executive Director Group Finance & Commercial

Pat Fenlon was appointed Executive Director, Group Finance & Commercial in July 2016. He previously held a number of senior financial and general management positions across ESB including General Manager of Electric Ireland, Corporate Change Manager and Group Finance & Commercial Manager. He is a fellow of Chartered Accountants Ireland and worked with PwC in Dublin before joining ESB in 1993.

Geraldine Heavey Geraldine Heavey Executive Director Enterprise Services

Geraldine Heavey was appointed to the position of Executive Director, Enterprise Services in June 2018. Prior to this she held the role of Group Finance and Commercial Manager. Has worked in various finance and managerial positions in ESB since 1993, including Finance Controller, Business Service Centre (BSC) and Electric Ireland, Manager, ESB Trading and Financial Controller, ESB Power Generation. She is an accountant and holds a masters degree in Business Administration (MBA) from Dublin City University. An external member of DCU’s Commercial Board and chairs its Audit Committee.

Sinead Kilkelly Executive Director People & Organisation

Sinéad Kilkelly joined ESB from Bus Éireann where she has held the position of Chief People Officer since 2018. Prior to this, she held a number of senior leadership roles including Vice President People Services at Etihad Aviation Group in Abu Dhabi, in addition to HR roles in Ulster Bank and Intel Ireland. Sinead has an MBA from Trinity College Dublin and is a Chartered Fellow with CIPD. 

Marguerite Sayers Marguerite Sayers Executive Director Customer Solutions

Marguerite Sayers was appointed Executive Director, Customer Solutions in May 2018. Prior to this she held the role of Managing Director ESB Networks Ltd. She has worked in various technical and managerial positions in ESB since 1991, including Generation Manager and Head of Asset Management for ESB Networks. She has a degree in Electrical Engineering from University College Cork (UCC), a diploma in Accounting and Finance from University of Limerick and a diploma in Project Management from UCC. A Chartered Engineer and a Fellow and Past President of Engineers Ireland.

Marie Sinnott Marie Sinnott Group Company Secretary of ESB

Marie Sinnott is Group Company Secretary of ESB. Prior to her appointment in 2019, Marie was ESB’s Group Head of Compliance and Enterprise Risk Management responsible for developing and leading the critical risk and crisis management processes for ESB Group. During her career in ESB, she has held a number of other senior management roles in project management, change management and procurement areas. A UCD commerce graduate, she holds an MSc in Economic Policy Studies from TCD and a Postgraduate Diploma in Corporate Governance from UCD Smurfit School. Marie is also a member of the Board of the Institute of International & European Affairs.

Paul Smith Executive Director Engineering and Major Projects

Paul Smith joined ESB in 1992 and has held a number of senior management roles in the company including Station Manager at Aghada Generating Station, Head of Generation Operations and most recently, Head of Asset Development where he led the expansion of ESB’s renewables portfolio in Ireland and the UK. He holds a B.Eng. in Electrical and Electronics Engineering from Queen’s University Belfast and also an MBA from UCD Michael Smurfit Graduate Business School.

Nicholas Tarrant Nicholas Tarrant Managing Director ESB Networks

Nicholas Tarrant was appointed Managing Director, ESB Networks in September 2021. Prior to this he held the position of Executive Director, Engineering and Major Projects. Nicholas joined ESB in 1993 where he held a number of senior management positions including Generation Manager with responsibility for ESB’s 4,800MW generation portfolio and lead manager on ESB’s €200m Novus Modus Clean Tech Fund. He is a chartered engineer at the Institute of Engineers of Ireland and holds an MSc (Management) from Trinity College, Dublin.