GroupM Taps Xandr’s Kirk McDonald for North America CEO

Mike Welch will take over as head of AT&T's ad-tech unit

Kirk McDonald will assume the new role at GroupM on Sept. 15. Getty Images

WPP’s media investment arm GroupM has hired Kirk McDonald as its new North America CEO, nearly nine months after the role was vacated by Tim Castree. Since then, global CEO Christian Juhl had assumed the responsibilities of that role on an interim basis.

@klundster kathryn.lundstrom@adweek.com Kathryn Lundstrom is Adweek's breaking news reporter based in Austin.
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