Before WWII, Miles Leverett was a young Ph.D chemical engineer working for Humble Oil & Refining Co. in Houston. He was contacted by his boss, and signed on to the Manhattan Project, going to work on the helium-cooled reactor proposal at the Met Lab. In addition, he was part of design engineering for the mechanical aspects of the Hanford reactors, and was initially in charge of the engineering group attached to X-I0, the small air-cooled reactor at Oak Ridge. After the war, Leverett continued a distinguished career in nuclear engineering, a field he pioneered, with an emphasis on reactor safety.