 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).In 1952 Haider returned to New York where he served for two years as deputy coordinator of worldwide production.