Lannan was commissioned an officer in the
United States Army in 1985. She was a Distinguished Graduate of the
Army Reserve Officers' Training Corps. Afterwards, she underwent training at
Fort Huachuca and was assigned to the
25th Infantry Division. She would serve with the
9th Infantry Division and
I Corps before joining the
Washington Air National Guard in 1993. From 2009 to 2013, Lannan was Vice Commander of the
194th Regional Support Wing. In 2013, it was changed to the 194th Wing and she became Commander, holding the position until 2015. That year, she served as Chief of Staff of the Washington Air National Guard before being assigned to the
Twenty-Fourth Air Force. Awards she has received include the
Legion of Merit, the
Meritorious Service Medal with six
oak leaf clusters, the
Air Force Commendation Medal with oak leaf cluster, the
Army Commendation Medal, the
National Defense Service Medal with
service star, the
Global War on Terrorism Service Medal, the
Army Overseas Service Ribbon, the
Armed Forces Reserve Medal with hourglass device and the
Air Force Outstanding Unit Award with two oak leaf clusters. ==Education==