After graduating from La Crosse, Harring coached high school football at Ladysmith High School in Ladysmith, Wisconsin (1958–1962) and at Lincoln High School in Wisconsin Rapids, Wisconsin (1963–1968).
Following his graduation from La Crosse, Harring coached high school football at Ladysmith High School in Ladysmith, Wisconsin from 1958 to 1962 and at Lincoln High School in Wisconsin Rapids, Wisconsin from 1963 to 1968.