1SG Sweeney enlisted into the US Army in January 2001 and attended Basic Training and AIT at Fort Leonard Wood, Missouri. His assignments include Driver/Gunner United Nations Command Security Battalion-Joint Security Area Korea; Driver/Team Leader/Squad Leader 258th Military Police Company, Fort Polk, Louisiana; Squad Leader/Desk Sergeant/PMO Operations Sergeant, 142nd Military Police Company; Yongsan Korea; Platoon Sergeant 1st Brigade Special Troops Battalion, 10th Mountain Division (LI), Operations Sergeant, 91st Military Police Battalion, Platoon Sergeant, and Operations Sergeant, 563rd Military Police Company, Fort Drum NY; NCOIC, Joint Staff Military Security Force, Washington, D.C. and First Sergeant, 557th Military Police Company, Camp Humphreys Korea.
1SG Sweeney has deployed in support of Operation Noble Eagle to the Pentagon (2002-2003); Camp Delta, Guantanamo Bay Cuba (2003-2004); Mazar-e-Sharif, Afghanistan (2010-2011); and Kandahar, Afghanistan (2012-2013).
His military education and training includes: Company Commander/1SG Pre-Command Course, Battle Staff NCO Course, Tactical Information Operations Course, Battlefield Forensics Course, Combat Tracker Canine Course, Senior Leader Course, Advance Leader Course, Basic Leader Course, 31E Conversion Course, Child Abuse Prevention Investigative Techniques course, Domestic Violence Intervention Training, Critical Incident Peer Support course, Logistic Systems course, Unit Prevention Leader, Unit Retention NCO, Unit Armor, and Combat Lifesaver course.
His awards and decorations include the Bronze Star Medal (1 OLC), Defense Meritorious Service Medal, Meritorious Service Medal (2 OLC), Army Commendation Medal (4 OLC), Joint Service Achievement Medal, Army Achievement Medal (5 OLC), Good Conduct Medal (5th Award), National Defense Medal, Afghanistan Campaign Medal (2 CS), Global War on Terrorism Expeditionary Medal, Global War on Terrorism Service Medal, Korean Defense Service Medal, Military Outstanding Volunteer Service Medal (2nd Award), Noncommissioned Officers Professional Development Ribbon (Numeral 3), Overseas Ribbon (Numeral 5), Nato Medal (ISAF), Joint Staff Identification Badge and the Combat Action Badge.
1SG Sweeney was the Distinguished Honor Graduate from ALC, and the Leadership Award recipient from ALC and BLC.