LeMasters has earned a master's degree from the Florida Institute of Technology and the Army War College.

[1] LeMasters began his career in a series of junior officer assignments in 1985; including, Maintenance Control Officer for the Main Support Battalion for the 1st Infantry Division at Fort Riley, Kansas, Materiel Management Officer for the U.S. Army Missile Command at Redstone Arsenal, Alabama, and Maintenance Manager for Division Support Command for the 8th Infantry Division (Mechanized) in Germany.

After serving as a staff officer with the 47th Support Battalion, 1st Armored Division, LeMasters was assigned as a Logistics Staff Officer for the Force Development and Evaluation Directorate at the U.S. Army Combined Arms Support Command at Fort Lee, Virginia in 1995.

In 2002, he assumed command of the 123rd Main Support Battalion (Mechanized) for the 1st Armored Division.

This article incorporates public domain material from Major General Clark W. LeMasters Jr. United States Army.