For over 45 years, his career has centered on the intersection of media, technology, and advertising.  He has held many roles, ranging from founding and leading digital ad industry startups to senior executive positions at WPP. The central theme of his work is finding new ways of making technologies work for marketers. His fascination with creating value for marketers through technology led him to pioneer innovation in early digital ad networks, the uses of search engine marketing, new methods of behavioral targeting, and big data. Earlier in his career, he co-founded 24/7 Media and led the company from a startup to a digital marketing and ad technology leader. WPP ultimately purchased 24/7 Real Media for $649 million.  With this purchase, he joined WPP, where he successfully led the transformation of Xaxis offerings as the digital industry ad industry evolved and served as the global president of WPP Digital. 24/7 Real Media was transformed to Xaxis and now exists as part of GroupM Nexus. David helped to steer the digital ad industry's development as a Board member of the Interactive Advertising Bureau (IAB) for over 20 years, as Chairman from 2009 to 2011, and as the first Chairman of the IAB Tech Lab. As a Board member and Chairman of the Finance Committee of the Advertising Education Foundation (AEF), he helps ensure the development of the next generation of advertising executives.