Willie Pietersen (New York, NY) is the former President of Tropicana, Seagram USA, and other multinational businesses. He is now a Professor of the Practice of Management at the Columbia Business School in New York. His approach to corporate strategy, called Strategic Learning, was first described in his book, Reinventing Strategy and his Strategic Learning concept has been taught to many business executives through Columbia's executive education programs, and also in numerous corporations. He has served as a teacher and advisor to many global companies, including Bausch & Lomb, Boeing, Contact Energy, Deloitte, Ericsson, ExxonMobil, Girl Scouts of the USA, DePuy, Novartis and Sony.