The Nuclear Decommissioning Authority (NDA) has announced David Peattie as its new CEO.
He will be responsible for leading the NDA in the decommissioning and clean-up of 17 nuclear sites across the UK, including Sellafield.
Mr Peattie will assume the role from today, when the outgoing CEO, John Clarke, will step down after five years in the role.
He previously led the successful turnaround of performance of North Sea assets and oversaw the start of the decommissioning project for the Dunlin Alpha Platform as head of Fairfield Energy.
Energy Minister Jesse Norman said: “The NDA carries out essential work decommissioning and cleaning up the UK’s nuclear legacy, keeping our citizens safe and secure and protecting the environment. David’s considerable experience in roles across the energy sector makes him well-placed to lead the organisation and take this vital work forward.”