Mr McAllister has served as Chair of the ONR since April 2019. His latest tenure starts on 1 April 2024 and runs until 31 March 2027.
He will continue to be responsible for ensuring that the ONR delivers its mission to provide efficient and effective regulation of the nuclear industry on behalf of the public.
Mr McAllister said:
"I am delighted to have been reappointed as Chair of the Office for Nuclear Regulation for three additional years, giving me the opportunity to contribute further to the development of the organisation which has been in process since its launch as an independent statutory corporation on 1 April 2014.
"The Board is determined that ONR remains a professional and highly-respected regulator while optimising its efficiency so that ONR is fit for the challenges ahead.
"The UK Government has identified a significant role for nuclear power in its Energy Security Strategy, and the presence of an effective, independent and agile regulator to ensure the safe and secure delivery of these ambitions is crucial."
Mr McAllister brings a wealth of experience and expertise to the role, gained in a wide-ranging career in the international oil industry.
