As part of the reshuffle, the Grey Global Group-owned agency said that Dene Dallas, co-CEO of MediaCom US, has been promoted to sole chairman of the US media services agency.
Both will report to Alexander Schmidt-Vogel, MediaCom Worldwide chief executive.
Schmidt-Vogel said that the repositioning was putting into words what the agency had been practicising for some time. The repositioning was developed after extensive research and it has dubbed the new strategy "People first, Better results".
"Our feedback from clients and the industry showed that 'People' are the most important factor in a media agency's service. Best quality people in the agency and best access to consumers are what clients most ask for. We provide both," Schmidt-Vogel said.
The management reshuffle comes at a sensitive time for MediaCom's parent company, Grey Global, which has expressed an interest in selling up.
UK-based WPP Group and France's Havas are interested in acquiring the $13bn (£7.1bn) business.
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