 After the war ended, Heavy was reduced in rank to captain on 16 February 1920, and posted to West Point as an instructor in August.He entered the Massachusetts Institute of Technology on 7 June 1921, and graduated on 6 June 1922 with a bachelor of science degree in civil engineering.He was Assistant District Engineer at Louisville, Kentucky from 1 September 1922 to 14 August 1924, and then returned to Fort Humphreys as an instructor in tactics at the U.S. Army Engineer School.