 He went on to hold positions ranging from director of international planning to president of GM Canada, president of GM Europe and head of international operations.As CEO of GM, he undertook one of its most sweeping reorganizations, overturning a cumbersome and inefficient structure created in the 1920s by Alfred P. Sloan and left virtually unchanged since then.Starting with purchasing in 1992 and ending with engineering in 2003, he brought together separate overlapping functions related to the various divisions that formed the company, while also expanding operations into Asia.