Enström has been a member of the Riksdag since 1998, representing Stockholm County. She was a member of the Defense Committee from 2002 to 2010, serving as its Chairman from 2008. After the 2010 general election she was appointed as Chairman of the Committee on Foreign Affairs and was also a member of the War Delegation and the Foreign Policy Council. Enström was commissioned as an officer in 1987, passed the Royal War College (Kungliga Krigshögskolan) common course in 1988, and its higher course in 1993. She currently holds the rank of captain in the Swedish Amphibious Corps. She has been a member of the City Council of Vaxholm since 1994 and was chairman of the council from 2002 to 2006.
She is married to Anders Enström, a lieutenant colonel in the Amphibious Corps employed at the Navy Tactical Staff Headquarters. She has three children.[7]