The role represents an extension of Grey's former role as director of policy comms for No10 and the Cabinet Office.
Cabinet Secretary Sir Jeremy Heywood said: ‘Jenny has a great understanding of how communications operate at the heart of government and I believe she is absolutely the right person to lead the organisation through this period of change.
‘Her dynamism and drive will ensure we continue to deliver a first class service.’
Grey said: ‘British communications industries lead the world in creativity and innovation and the Government has a proud history of working with them to deliver ground-breaking campaigns.’
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