He was also a member in the Scandinavian defense negotiations from 1948 to 1949. In 1949 he was transferred to Boden Artillery Regiment, where he was appointed major, and in 1953 he returned to the Defence Staff. There Löfgren headed the Foreign Department from 1953 to 1956, and was promoted to lieutenant colonel in 1955. Löfgren served as military attaché in Washington, D.C. and Ottawa from 1956 to 1961 and was promoted to colonel in 1959. He was then commander of Wendes Artillery Regiment from 1961 to 1963. In 1963, he was a member of the Swedish delegation to the Eighteen Nation Committee on Disarmament in Geneva with Alva Myrdal. Returning home from Geneva he took over as deputy commander of the I Military District in Kristianstad. In 1966, Löfgren was promoted to major general and from 1967 to 1973 he served as Commanding General of Bergslagen Military District. He was promoted to lieutenant general on the retired list in 1973.
