Radiation Lab 1942-1945; Department of Electrical Engineering: Faculty 1946-1966; Institute Professor 1980-1994; Department Head 1959-1961; Director RLE 1952-1961; Dean of the School of Science 1964-1966; Provost 1966-1971; President of MIT 1971-1980; Honorary member of MIT Alumni Association 1971; Bronze Beaver Award 1979.