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Sir John brings a wealth of experience in the energy industry and across both the private and public sectors. He held senior executive roles within BP and Talisman Energy before spending six years as Chief Executive of the Civil Service and Permanent Secretary of the Cabinet Office, where he was responsible for the administrative and commercial performance of government departments and oversaw preparations for a no-deal Brexit.

He stepped down from the civil service earlier in the summer, and in April he was appointed non-Executive Director at Diageo, effective 1 October 2020. He was previously non-Executive Director of SABMiller plc from 2004 to 2015, and Chair of Leyshon Energy Ltd from 2013 to 2014.