National Museum of Nuclear Science & History
Dorothy Isgett worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Walt Simon, a chemist, was Hanford’s first Operations Manager. Before joining the Manhattan Project, he was plant manager at Wabash River Ordnance Works, a DuPont plant near Terre Haute, Indiana.
Homer W. Ibser was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Charles Critchfield (1910-1994) was an American mathematical physicist. In December 1942, he was approached by J.
M. N. Andrews worked for the J.A. Jones Construction Company.
