Fenn entered the
Foreign Office in 1959 and worked as secretaries at various posts overseas, spokesperson at the FCO and as counselor at the British Embassy in Peking. Fenn was fluent in Burmese after undergoing training in 1960 and assigned to Burma in the early 1960s. Fenn's ambassadorships included Rangoon (1982–86) and Dublin (1986–91). Fenn retired in 1996. Following his career with the diplomatic service Fenn served as chief executive of
Marie Curie, from 1997 to 2000, after retiring as chief executive he continued to serve the charity as chair of its council of trustees until 2006. From 1972 to 1975 he was with the Energy Department (as Deputy Head) in the Foreign Office and at the
Royal College of Defence Studies in 1978. ==References==