1940
Special Assistant to the Quartermaster-General
1940
- 1941
Chief of Operations Branch, Construction Division, Office of the Quartermaster-General
1941
- 1942
Deputy Chief of Construction Division, Office of the Chief of Engineer
1942
- 1946
Commanding General Manhattan Engineer District
1942
- 1946
Supervisor of the Manhattan Project
1947
- 1948
Commanding General Army Forces Special Weapons Project
1947
- 1948
Member of the Military Liaison Commision to the Atomic Engery Commission
Picture source: http://www.atomicarchive.com/History/firstpile/p5_image.shtml