View Post Agencies | People Zelley Joins Campbell Ewald as CD on Cadillac By Kiran Aditham on Jul. 24, 2013 - 10:41 AM It looks like the agency now known as Lowe Campbell Ewald is slowly ramping up staff on its portion of the Cadillac business as the Detroit stalwart has brought on Matthew Zelley as creative director on said account. CE of course ...