IPG Mediabrands Ups Jim Hytner to Global COO Brand Marketing By Noreen O'Leary June 1, 2015 New IPG Mediabrands CEO Henry Tajer is beginning to make his presence felt. Brand Marketing Kirshenbaum Bond Senecal Adds a Global Chief Marketing Officer By Kristina Monllos Brand Marketing Matt Seiler Is Out to Remake and Automate the Media Agency World By Noreen O'Leary Brand Marketing Media Agency Bosses Tackle Turnover, Transparency By Andrew McMains Brand Marketing Mediabrands, UM, Initiative Reorganize Management By Noreen O'Leary