Day has worked at the WPP network for 10 years and has been chief financial officer at Group M since 2003. In his new role he will oversee the day-to-day running of the network.
Day will be based at Group M’s New York office and report to Group M chief executive Irwin Gottlieb.
Group M has also promoted MindShare’s US chief executive Marc Goldstein to the post of chief executive of Group M in the US.
Agency
Group M makes Day chief operating officer
Group M, the WPP media agency network comprising MediaCom, MindShare, Mediaedge:cia and Maxus, has promoted its chief financial officer Rupert Day to chief operating officer.