Crawford Greenewalt

Crawford Hallock Greenewalt was an American chemical engineer who spent his career at the DuPont Company, serving as its president from 1948 to 1962 and as chairman from 1962 to 1967. During the Second World War he was one of DuPont's leading figures in the Manhattan Project, working on the design and operation of the plutonium-production reactors the company built and ran at the Hanford Site, and his wartime diaries later became an important primary source on the project's engineering history. After the war Greenewalt continued to guide DuPont's involvement in nuclear power and atomic energy programs, applying the company's chemical engineering expertise to the peacetime nuclear industry.