Nigel Bogle, co-founder and group chief executive of BBH, is to move into a group chairman role as part of a senior management rejig at the 25-year-old agency.
The reshuffle, which aims to secure the management succession at one of the UK's best-known ad agencies, will see the group chief operating officer, Simon Sherwood, take over Bogle's former role of group chief executive.
The top-level opening of group chief operating officer will be filled by Gwyn Jones, most recently the chief executive of BBH New York.
Jones, 41, joined BBH London as one of the agency's first graduate trainees in 1987 and was sent to New York in 2004 to gain international experience after previously holding the chief executive role in London.
"The business has grown a lot in recent years and Gwyn will take over a lot of the day-to-day business of running the various operating units such as overseeing business development plans and each of our offices around the world," said Sherwood, who joined BBH as its first account manager in 1982.
"I will look at broader, less office-specific issues and be client-facing and product-facing, drive the creative reputation [of the agency]."
As group chairman Bogle said he would continue to focus on the future development of the BBH brand and "our journey into new ventures and revenue streams".
BBH, which has offices in London, Singapore, Sao Paulo, New York, Shanghai and Toyko, is expanding into India later this year.
Separately, Orlando Hooper-Greenhill, BBH's head of international planning, is to leave the agency to join Sir Martin Sorrell's WPP subsidiary JWT in the new role of director of global planning.
Hooper-Greenhill, a previous founding partner of the failed agency venture between Ben Langdon and Mark Wnek, joins JWT on January 21 and will report to Guy Murphy, who heads the agency's worldwide account planning operation.
Murphy, formerly deputy chairman at BBH, moved to JWT in October 2006.
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