National Museum of Nuclear Science & History
Seckendorff worked for Stone and Webster Engineering Corporation.
Margaret J. Nickson was a medical doctor in the Biology Division at the University of Chicago Met Lab.
A Missourian by birth, W.K. ("Mac") MacCready held undergraduate and graduate degrees in physical chemistry from the University of Alabama.
Winfield Sylvester was a staff worker at Los Alamos during the Manhattan Project.