Lieutenant General Mundy received a commission after graduating from Auburn University in August 1983. An infantry officer, he has commanded at the platoon, company, battalion, Marine Expeditionary Unit, Marine Expeditionary Brigade and Naval Task Force levels. Prior to his current assignment he served as the Commander, U.S. Marine Corps Forces Special Operations Command at Camp Lejeune, North Carolina.

He has deployed multiple times over his career including Somalia during Operation Restore Hope, and twice to Iraq, first as a battalion commander and later as a Marine Expeditionary Unit commander, during Operation Iraqi Freedom.

 He has also served in several staff and training assignments beginning with the Marine Corps Recruit Depot at Parris Island, South Carolina; The Basic School in Quantico, Virginia; the I Marine Expeditionary Force headquarters at Camp Pendleton, California; the Marine Corps Office of Legislative Affairs; the Joint Improvised Explosive Device Defeat Organization in Washington D.C.; HQMC in Washington D.C; U.S. Central Command in Tampa; and as the Deputy Commanding General of I Marine Expeditionary Force at Camp Pendleton, California.

Between these assignments he attended the United States Army Armor Officer Advanced Course and Cavalry Leaders Course at Ft Knox, Kentucky; the Marine Corps Command and Staff College and School of Advanced Warfighting at Quantico, Virginia; the Joint Forces Staff College in Norfolk, Virginia; and he studied foreign policy at The Brookings Institution in Washington, D.C.

His personal decorations include the Defense Superior Service Medal; Legion of Merit with a "V" device; Bronze Star; and the Combat Action Ribbon. LtGen Mundy is married and has two daughters.