GroupM Interaction names John Montgomery COO


John Montgomery, a GroupM digital media specialist with expertise in emerging  ad  technologies,  was  named COO of GroupM Interaction North America, a new position. Since 2005, Montgomery  has served as worldwide CEO of GroupM’s MindShare Interaction,  where he managed  the  firm’s  global  growth  and  oversaw expansion  into emerging technologies including mobile, viral marketing and interactive television.  Montgomery’s new responsibilities will include oversight of strategic and operations activities  at  each  of the unit’s interactive networks.