 In 1938 he moved to New York as manager of Exxon's production engineering and research, and in 1945 became executive assistant in the Producing Department.In 1946 Haider moved to Toronto, where in 1947 as manager of the Producing and Exploration Department of Imperial Oil, Limited, a Canadian affiliate, he obtained the Leduc oil field that made western Canada a net oil exporter.He was subsequently elected a director of Imperial (1948) and vice president (1950).