GroupM names Wavemaker’s Tim Castree as North America CEO

Group M has named Tim Castree to fill the vacant position of North America chief executive.

Castree formerly served as global CEO of Wavemaker, the product of a 2017 merger between media agencies MEC and Maxus that sought to counter the turn toward commoditization in ad-buying services.

GroupM says Castree will be charged with further improving the competitiveness of the business and delivery to clients in the US and Canada. GroupM’s agencies include Mindshare, MediaCom, Wavemaker, Essence, m/Six and Xaxis.

“Media has never been more dynamic and demanding. After its first formative year, Wavemaker is in a strong position and delivering on its promise of growth for brands, so this is a good time to take on a new challenge which I’m hugely excited about. The US and Canada are incredibly important markets for our clients, and for GroupM and WPP. I’m looking forward to working even more closely with the leaders across our agencies to expand our collaboration and give clients the expertise, simplicity, innovation, and performance they need in a fast-changing marketplace.”

Tim Castree, CEO North America at GroupM







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