In 2003, she received a certificate in Legislative Studies from Georgetown University in Washington, D.C. She graduated from the Air War College in 2003, by correspondence.

She was the operations officer at the 1st Space Launch Squadron, Cape Canaveral Air Force Station, Florida.

[3] Armagno served as second Commander, 30th Space Wing, Vandenberg Air Force Base, California, responsible for space lift and range operations, and support of operational and developmental missile system testing for the Department of Defense from the West Coast of the United States.

[3][8] On June 12, 2013, Armagno was promoted to brigadier general and took command of the 45th Space Wing and director of the Eastern Range at Patrick Air Force Base, Florida.

There, she was responsible for the processing and launching of U.S. government and commercial satellites from Cape Canaveral Air Force Station, Florida.

In addition, she managed wing launch and range infrastructure supporting NASA, commercial, and missile test missions.

She stayed there for a year before getting reassigned to the Pentagon to serve as the director for space programs at the Office of the Assistant Secretary for Acquisition.