Between his first and second year at Harvard Business School, Lin undertook a summer internship program with Lorenzo di Bonaventura, who was then an executive with Warner Bros. Pictures. In 1999, a day after Lin's graduation, the studio executive offered Lin a junior position at Warners. Lin worked his way up to Senior Vice President of Production and left in 2007 to form his own company. During his eight years at Warners, Lin oversaw the development and production of the Academy Award-winning film "The Departed", directed by Martin Scorsese. Other films Lin oversaw include "10,000 BC", directed by Roland Emmerich; "The Aviator", directed by Martin Scorsese; "Alexander", directed by Oliver Stone; "TMNT"; "The Invasion"; "Unaccompanied Minors"; "Matchstick Men"; ""; and "Torque".