It was announced on 11 October 2011 that, following O'Donnell's retirement at the end of 2011, the role of Head of the Home Civil Service would be split from the post of Cabinet Secretary; there would additionally be a new, separate, Permanent Secretary to lead the Cabinet Office. After O'Donnell's retirement, Jeremy Heywood replaced him as Cabinet Secretary – serving until 24 October 2018 when he retired on health grounds; Ian Watmore as Cabinet Office Permanent Secretary; and lastly, Bob Kerslake as Head of the Civil Service. In July 2014 it was announced that Kerslake would step down and Heywood would take the title of Head of the HCS while John Manzoni would be Chief Executive of the Civil Service. From 24 October 2018 to 4 November 2018, the office of Head of the Civil Service was vacant, as Heywood resigned on health grounds. Following Heywood's death, Mark Sedwill was given the additional Civil Service portfolio. Simon Case succeeded Mark Sedwill as Cabinet Secretary and Head of the Home Civil Service in 2020 until resigning in December 2024 on health grounds. Sir Chris Wormald took over the roles on 16 December 2024.
It was announced on 11 October 2011 that, following O'Donnell's retirement at the end of 2011 the role of Head of the Home Civil Service would be split from the post of Cabinet Secretary; there would additionally be a new, separate, Permanent Secretary to lead the Cabinet Office. After O'Donnell's retirement Jeremy Heywood replaced him as Cabinet Secretary – serving until 24 October 2018 when he retired on health grounds; Ian Watmore as Cabinet Office Permanent Secretary; and lastly, Bob Kerslake as Head of the Civil Service. In July 2014 it was announced that Kerslake would step down and Heywood would take the title of Head of the HCS while John Manzoni would be Chief Executive of the Civil Service. From 24 October 2018 to 4 November 2018, the office of Head of the Civil Service was vacant, as Heywood resigned on health grounds. Following Heywood's death, Mark Sedwill was given the additional Civil Service portfolio Simon Case succeeded Mark Sedwill as Cabinet Secretary and Head of the Home Civil Service in 2020 until resigning in December 2024 on health grounds. Sir Chris Wormald took over the roles on 16 December 2024.