This was followed by promotion to permanent lieutenant general in July 1990 and assignment as deputy chief of staff for operations and plans and Army senior member, Military Staff Committee, United Nations, Washington, D.C., from 1990 to 1991. Reimer received his fourth star in June 1991, serving as Vice Chief of Staff of the United States Army from 1991 to 1993. He then served as commanding general, United States Army Forces Command, Fort McPherson, from 1993 to 1995 before being selected as Chief of Staff of the United States Army.