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Mediabrands, the media management arm of Interpublic, has appointed Matt Seiler CEO. He was most recently global CEO of Universal McCann.
Seiler replaces Nick Brien, who early last year was elevated to CEO of McCann Worldgroup. The post has been vacant, and Mediabrands was being run on an interim basis by a committee that included Seiler, worldwide Initiative CEO Richard Beaven and Mediabrands Ventures CEO Matt Freeman.
Replacing Seiler at UM is Jacki Kelley, who had been North American CEO at the agency since 2009.
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