Smithsonian Institution. Assistant Secretary for Science.

The first person named Assistant Secretary for Science was Thomas Dale Stewart in 1964, although many of the functions of the office had previously been handled by one of the Assistant Secretaries. Sidney R. Galler was named to the position in 1965; and in 1971 David Challinor became Assistant Secretary for Science.

The Assistant Secretary for Science served as the administrative link between the Secretary and the following Smithsonian bureaus: Center for the Study of Man, the Chesapeake Bay Center for Environmental Studies, National Air and Space Museum, National Museum of Natural History, National Zoological Park, Office of Environmental Sciences, Radiation Biology Laboratory, Smithsonian Astrophysical Observatory, Smithsonian Science Information Exchange, and the Smithsonian Tropical Research Institute.