Crawford Hallock Greenewalt (1902-1993) was a chemist and President of the DuPont Company from 1948 to 1962. Born August 16, 1902 in Cummington, Massachusetts, Crawford H. Greenewalt was the son of Frank Lindsay and Mary Elizabeth Hallock Greenewalt. He graduated from William Penn Charter School in Philadelphia and earned a BS in chemical engineering from Massachusetts Institute of Technology (MIT) in 1922. Immediately after graduating from MIT, Greenewalt began a life long career with the DuPont Company. He began working as a control chemist in the Philadelphia Works of the Paint, Lacquer and Heavy Chemicals Department. He went on to be elected as Vice President of the DuPont Company on May 19, 1947 and as President of the DuPont Company on January 19, 1948.