Sanjay Nazerali has been named global brand and client president of Dentsu X, the integrated communications agency network (formerly known as Dentsu Media).
He succeeds Mike Nakamura, a long-time Dentsu executive, who stepped down from Dentsu X in December to become a managing director of Tokyo-based Dentsu.
Nazerali previously was global Chief Strategy Officer of Dentsu Aegis Network, which late last year was rebranded as Dentsu International.
He joined Dentsu in 2013 from a marketing role at BBC News.
Separately, Dentsu has also promoted Fiona Lloyd to global client president of its Carat unit.
Lloyd, who is based on Carat's London office, continues as a global managing director of the agency.
Lloyd has been with Carat and Dentsu since 2005, when she joined from he London office of GroupM's Mindshare.