Miccarelli has served in the Pennsylvania Army National Guard since October 1999 and remains actively serving today as a Staff Sergeant. His military service spans more than 25 years and includes multiple deployments and operational roles. He volunteered for service in Ramadi, Iraq in October 2005 and deployed in 2006. He also completed a Kosovo peacekeeping deployment from 2003 to 2004. In 2009, he deployed to Iraq with the 28th Combat Aviation Brigade, serving as a door gunner on a UH-60 Blackhawk helicopter with B Company, 1-150th Assault Helicopter Battalion. His service has been recognized with the Combat Infantry Badge, Army Commendation Medal, and Army Achievement Medal.