Ensour was first elected as a deputy to the Jordanian Parliament in 1989, again in 1992, and a third time in . His first ministerial post was as Minister of Planning in 1984. He then became Minister of Planning again in 1985; he also served as Minister of Education (1989); Minister of Foreign Affairs (1991); Minister of Industry and Trade (1993); Minister of Higher Education (1996); Deputy Prime Minister and Minister of Administrative Development (1997); and Deputy Prime Minister and Minister of Information (1998). He also served in the parliament in the lower house of representatives from 1989 to 2001.