Dr Marshall Brucer (1913–1994) was an American medical researcher from Chicago, Illinois. He was appointed Chairman of the Medical Division of Oak Ridge Institute of Nuclear Studies in 1949, where he researched the applications of radiation in the treatment of cancer and other malignant diseases. He retired as Division chairman in 1962. A compendium of his writing entitled "A Chronology of Nuclear Medicine" was published by Robert R. Butaine in September 1990.