Brian Steinberg Senior TV EditorKirk McDonald. a top executive at WarnerMedia’s Xandr ad-tech unit, was named the new CEO of North American operations of WPP’s large GroupM media-buying firm, marking the latest in a string of top advertising leaders to leave the AT&T media operation.GroupM is one of the largest and most influential media-buying operations in the industry, managing about $17.6 billion in media billings across the U.S.
and Canada. McDonald will take over the role on September 15. The Wall Street Journal previously reported on McDonald’s hire.“We were looking for someone who had both the right experience in media and the capability to lead the region through transformational change.
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