Matt Gierhart is a marketer with 7 years experience across Europe and America. He currently sits as the Head of Social for Ogilvy Action's global network. At Ogilvy Action he works with global brands to provide purchase behaviour insights.

Matts main task is exploring what impact social media has on purchase behaviour, rather than just brand perception or an advertising messages. Prior to joining Ogilvy Action, he directed a small digital think tank called The New Celebrity that worked with economic development groups and brands understanding the impact of social structures.