Simon Sherwood, currently the group chief operating officer, replaces Bogle as the group chief executive. Gwyn Jones, the former chief executive of BBH New York, becomes the group chief operating officer. Sir John Hegarty's position as the worldwide creative director is unaffected.
The changes are designed to strengthen the agency's global management team and to promote management succession in key roles. Bogle will now focus on development of the BBH brand and on new ventures and revenue streams.
Sherwood said: "We're famous for our succession planning and this move has been talked about for a long time. However, with Gwyn coming back to the UK and the extension of our network into India with the launch of an agency in Mumbai this year, it seemed like the correct time to formalise things."