Foster has been worldwide chief operating officer at Saatchi & Saatchi since January. Prior to this he spent four years as the chairman and regional chief executive of the agency’s Asia Pacific and Greater China offices.
He will relocate from Singapore to Publicis Groupe’s Parisian headquarters. He starts his role on 1 September and will report to Rishad Tobaccowala, the chief strategist at Publicis Groupe.
Publicis Groupe's chief executive and chairman, Maurice Lévy, said: "Our clients are facing serious challenges due to technology and innovation in this ever changing world. Chris Foster will help our clients to extract the best from our talents and our formidable assets through integrated solutions.
"Chris has been deeply involved in the strategy and operations of several Groupe clients. His track record for growth and collaboration has defined his tenure and makes him perfectly suited for this role at this time."
Prior to his time in Asia, Foster was chief executive of Fallon USA for four years. He has been a member of the Saatchi & Saatchi global leadership team since 2011.