From 1941 to 1945 Dr. Landau worked as a process development engineer and head of the chemical department of the Kellex Corporation, in the Manhattan Project's K-25 production plant at Oak Ridge, Tennessee.
From 1941 to 1946 Dr. Landau worked as a process development engineer for M. W. Kellogg Company. From 1943 to 1945, he was head of the chemical department of the Kellex Corporation, in the Manhattan Project's K-25 production plant at Oak Ridge, Tennessee.