- Chief instrument research div., 1947-1958, chief space science projects. Office Space Flight Development, 1958-1960, assistant director satellite and sounding rocket programs, 1960-1961, deputy director Office Applications, 1961-1962, acting director, 1962, director, since 1962.
Member working group telemetering Research and Development Board, 1946-1950, chairman working group precision tracking radar, 1948-1950. Member pane unmanned spacecraft Aero. and Astronautics Coordinating Board, since 1960, chairman, since 1961. Member American Institute of Elctrical Engineering, Institute of Radio Engineers, American Geophysical Union, Association Computing Machinery.