Kinkel was a career civil servant and a longtime aide to Hans-Dietrich Genscher, and served as his personal secretary in the Federal Ministry of the Interior from 1970 and in senior roles in the Foreign Office from 1974. He was President of Federal Intelligence Service from 1979 to 1982 and a state secretary in the Federal Ministry of Justice from 1982 to 1991. In 1991 he was appointed as the Federal Minister of Justice and joined the liberal Free Democratic Party (FDP) shortly after. In 1992 he became Foreign Minister, and in 1993 he also became the Vice Chancellor of Germany and the leader of the Free Democratic Party. He left the government in 1998 following its electoral defeat. Kinkel was a member of the Bundestag from 1994 to 2002, and was later active as a lawyer and philanthropist.