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Christian Castellano is currently the Managing Director of Digital Strategy at Sullivan, leading digital practices for various clients. Prior to this, Christian held leadership positions at Digitas North America, Hill Holliday, and Ogilvy, spearheading digital transformations for brands like American Express, Verizon Wireless, IBM, and Pitney Bowes. Castellano holds a BSBA in Marketing & Economics from the University of Delaware.