David K. Devaney joined the Marine Corps as an infantry rifleman in 1983. After two deployments overseas he was selected to the Surveillance and Target Acquisition (STA) platoon for duty as a scout sniper. He deployed ten times with Marine Corps units and five times with Army Special Forces elements, serving as a sniper. He retired in 2014 as the Command Sergeant Major for Weapons Training Battalion, Quantico, Virginia.