NEW YORK--(BUSINESS WIRE)--IPG Mediabrands worldwide CEO Henry Tajer has created a new global position within the media group, announcing award-winning executive Mat Baxter as Global Chief Strategy & Creative Officer. Baxter’s appointment follows Tajer’s recent announcement that John Sintras was appointed IPG Mediabrands’ president, global business development and product innovation. Both of the new appointments are New York based, reporting to Tajer. Baxter’s role sees him take responsibil