National Museum of Nuclear Science & History
Manning worked for Stone and Webster Engineering Corporation.
Jack Rose was a machinist and armorer in the Special Engineering Detachment (SED) assigned to the 509th Composite Group in Wendover, Utah.
W. C. Marr worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Coogler worked at the Oak Ridge project site during the Manhattan Project as a member of the U.S. Army Corps of Engineers.
