Nuclear Museum Logo
Nuclear Museum Logo

National Museum of Nuclear Science & History

Leonard Czarniecki

Procurement Planning & Control OfficerOak Ridge, TN

Manhattan Project VeteranMilitary VeteranSpecial Engineer Detachment
Leonard Czarniecki

Leonard Czarniecki served as procurement planning and control officer with 9812th Technical Services Unit (Special Engineer Detachment) at Oak Ridge, TN, with the Y-12 Plant. He coordinated and supervised procurement of materials and equipment, and was directly responsible for approving purchase requisitions submitted by civilian contractor for over $2000. He was also responsible for approving all government purchase requsitions submitted by civilian contractors. He assisted contractors in establishing control procedures and maintained detailed central records of important classes of materials. He also acted as Liaison Officer between civilian contractors and War Production Board expediting critical operational materials.  

For his work, Czarniecki was awarded an American Theater Medal, a Victory Medal, an American Defense Service Medal, and a Meritorious Service Unit Plaque for the 9812  Technical Services Unit, US Corps of Engineers, Manhattan District.

Leonard Czarniecki's Timeline
1938 Received his Bachelor's degree in Chemical Engineering from Michigan State University.
1944 Nov 8th Assigned to Special Engineering Detachment in Oak Ridge, TN.
1944 Nov 16th1944 Dec 31st Served as Technical Operations Officer, 9812 Technical Services Unit, US Corps of Engineers, Manhattan District.
1945 Jan 1st1945 Jun 30th Served as Procurement Expediter, 9812 Technical Services Unit.
1945 Jul 1st1945 Sep 16th Served as Procurement Control and Production Officer, 9812 Technical Services Unit.
1945 Sep 17th1946 Apr 8th Served as Chief, Supply Section, Y-12 Plant, Electromagnetic Separation Process, 9812 Technical Services Unit.

Leonard Czarniecki's War Department ID badge

Letter from Colonel Kenneth Nichols praising Leonard Czarniecki's work

Leonard Czarniecki's Defense Medal

Leonard Czarniecki's ID during the Manhattan Project

Leonard Czarniecki's promotion confirmation

Leonard Czarniecki's certificate that he worked on the Manhattan Project

Leonard Czarniecki's wife and son at Oak Ridge

When Leonard Czarniecki was released from active duty in Oak Ridge, this was his release sign off sheet from each of the departments he had to check out with. (Page 1)

When Leonard Czarniecki was released from active duty in Oak Ridge, this was his release sign off sheet from each of the departments he had to check out with. (Page 2)

Y-12 cartoon

Letter from Stone and Webster to Leonard Czarniecki expressing appreciation for his cooperation and achievement on the project and enclosing a lapel pin

Army-Navy "E" Award program

Army-Navy "E" Award program

Memo advising Leonard Czarniecki could wear 4 meritorious insignia while he was attached to 9812 TSU-CE, Manhattan District

Leonard Czarniecki's Master of Public Health degree

Leonard Czarniecki's bachelor's degree from WSU. His father tore up his diploma  because he was upset that his son didn't want to continue in the family business.  

Leonard Czarniecki's wife

Leonard's sister, Regina Eugenia Czarniecki

Related Profiles

F. B. Von Unwerth

Hanford, WA

Richard E. Blouse

Tinian Island

Richard E. Blouse served as a corporal in the 393rd Bombardment Squadron. He was a member of the ground crew regularly assigned to the B-29 Necessary Evil.

Rudolph W. Hogg

Tinian Island

Rudolph W. Hogg served in the 1st Ordnance Squadron.

Charles R. Brower

Hanford, WA