 In the late 1950s and in the 1960s he worked as a research assistant at MIT before serving in the United States Air Force and also carrying out research there at the Air Force Cambridge Research Laboratories (AFCRL) at Hanscom Air Force Base and also working at Haskins Laboratories.From 1967 to 1974 he worked at the University of Connecticut.In 1974 he was appointed to the faculty at Brown University, where he was George Hazard Crooker Professor from 1992 to 1997.