John K. Marshall, The DrillMaster, served 20 years in the US Air Force with 14 of those years dedicated to the Air Force Base Honor Guard program. He retired in 2005. When his wife, an Air Force nurse, was stationed at Spangdahlem Air Base in Germany, he became the first and only retired member of the Spangdahlem Base Honor Guard after both the officer in charge and non-commissioned officer in charge were eager to have his experience on the team. By joining the Spangdahlem team, he also became the first and only AP3 member in Europe and quite possibly overseas.

He has been a member, instructor and/or judge for marching bands, drum and bugle corps, indoor guard and percussion units, military drill teams and honor guard units around the world. In 2009, through DrillMaster Press, he began writing and publishing the first modern books for the military drill world.

John is also a Staff Sergeant in Military Cadets, Inc. a program similar to Sea Cadets, Young Marines and Civil Air Patrol. He is the Drill Master for Forest Hill Military Academy located in Millersburg, KY which is also the National Cadet Training Center (NCTC).

During the summer of 2013, The DrillMaster taught the first ever Cadet Joint Service Honor Guard Academy at the NCTC along with hand-picked ceremonial guardsmen and Drillers from across the country. The course is a two-week intensive for cadets from all organizations and is based on his book, The Honor Guard Manual.