John Quelch was one of ten marketing experts profiled in the 2007 book, Conversations with Marketing Masters, authored by Laura Mazur and Louella Miles. A professor at Harvard Business School since 1979, he is known worldwide for his research on global marketing, global branding and marketing communications. John is a non-executive director of WPP Group plc, the world's second largest marketing services company, and of Pepsi Bottling Group. He served previously as a director of Reebok International.