 Dwyer returned to the States in August 1953 and served for two years as an aide to the Joint Chiefs of Staff.In December 1955, he was promoted to lieutenant colonel.From 1955 to 1958, Dwyer served as an instructor at Marine Corps Schools, Ouantico, followed by a tour of duty in London on the staff of CINCNELM/CINCUSNAVEUR, After attending the Armed Forces Staff College, he joined the 2nd Marine Division and assumed command of the 2nd Battalion, 6th Marines as Assistant Force Marine Officer, Amphibious Plans and operations officer.