Reimer returned to Fort Sill as deputy assistant commandant, Field Artillery Center and School from 1983 to 1984. He was promoted to permanent brigadier general in September 1984 and took up assignment as commanding general, III Corps Artillery, Fort Sill, from 1984 to 1986. He served as chief of staff, United States Army Element, Combined Field Army in the Republic of Korea in 1986, followed by assistant chief of staff, C3/J3, Republic of Korea/United States Combined Forces Command from 1986 to 1988. He received promotion to major general in September 1987 and commanded the 4th Infantry Division (Mechanized) at Fort Carson from 1988 to 1990.