Stewart has spent over 10 years working on making some incredible products for American Express customers. He is currently their Vice President of Global Mobile and Commerce Products. Before that, he was Vice President of Global Mobile Products and before that of international mobile products. He also held two Director positions working for international mobile products and international innovation labs. His career at the company began as a Manager for mobile capabilities. He has worked in international markets with the company including in New York City and London. Before AmEx, Stewart was a Mobile Account Manager at the design and communications company, AKQA.