Clardy's command positions include platoon commander with 3d Battalion, 4th Marine Regiment and company commander in 2d Light Armored Reconnaissance Battalion. He commanded the 3rd Light Armored Reconnaissance Battalion in Operations Enduring Freedom and Iraqi Freedom and 2nd Marine Regiment and Regimental Combat Team 2 during Operation Iraqi Freedom. As a general, he served as the Commanding General of Marine Air Ground Task Force Training Command, Marine Corps Air Ground Combat Center, and as the Commanding General, 3rd Marine Division.[6]
Clardy served in multiple leadership and staff positions throughout his career. He was a tactics instructor at The Basic School and Infantry Officer Course, the Marine Officer Instructor at Tulane University, and the Community Relations Branch Head for the Division of Public Affairs, Headquarters Marine Corps. He served as the Operations Officer of 24th Marine Expeditionary Unit (Special Operations Capable) participating in Operation Joint Guardian and as the Community Policy, Planning and Liaison Officer for Marine Corps Bases, Japan. He was the Director for the Expeditionary Warfare School and the Director of Operations for the Plans, Policies, and Operations Department of Headquarters, United States Marine Corps.
In April 2019, Clardy was nominated to become the next commander of III Marine Expeditionary Force and Marine Forces Japan.[7][8] With the confirmation of his successor, Clardy has retired from active duty.[9]