 Duelfer's 25 years of government service involved policy and intelligence in the Middle East, Africa, Central America, and Asia, and in the areas of nuclear weapons and space programs.Duelfer joined the Politico-Military Bureau of the State Department in 1983 and was responsible for special regional activities including conflicts in Chad, Libya, and Grenada as well as ongoing strategic verification, space, and strategic defense issues.In 1984, he became Deputy Director of the Office of International Security Policy and was responsible for European, Africa, and Latin America regions.