He then attended navigator training at Randolph AFB, Texas, and Pensacola Naval Air Station, Florida.

There he directed the Air Force's nuclear modernization, acquisition and sustainment programs with more than 1,300 personnel at 18 locations worldwide.

[2][3] On March 5, 2020, Knapp was appointed Adjutant General of the Wisconsin National Guard by Governor Tony Evers.

[5] On November 18, 2020, Knapp was nominated for federal recognition and United States Senate confirmation of his promotion to major general.

He has 681 combat hours, more than 262 combat sorties supporting operations Allied Force, Northern Watch, Southern Watch, Enduring Freedom, Iraqi Freedom and Joint Task Force Horn of Africa.