Margaret Caldes

SecretaryLos Alamos, NM

Manhattan Project VeteranProject Worker/StaffSpouse to Manhattan Project Worker

Margaret Caldes moved to Los Alamos when her husband, William E. Caldes, was recruited to join the project in 1943. She worked as a secretary for Julian Mack in the photography department.

Related Profiles

H. J. Von Holten

Hanford, WA

Ralph A. James

Chicago, IL

Ralph A. James (1920-1973) was a research associate in the Chemistry Division at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

C. E. Obenchain

Hanford, WA

Raymond Begnoche

Tinian Island

Raymond Begnoche served in the 1st Ordnance Squadron.