You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Kristen Cavallo Ascends to President at Mullen's Boston Office Expands the Ranks of Female Leadership at Boston Agencies By Shareen Pathak, Published on March 18, 2014 1 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.