Molly Hooper-Aldridge will be replaced at the Weber Shandwick sister agency by Helena Bloomer, who is a director at the London practice.
In the newly created role at the M&C Saatchi Group company, Hooper-Aldridge will focus on expanding UK business, while exploring international growth. She will work alongside MD Chris Hides.
Hooper-Aldridge said she was persuaded to move on by the ‘scale of the potential’ of the new role.
Steve Martin, chairman of M&C Saatchi PR, added: ‘She brings a proven track record in building a global PR business.’