Foldberg's first coaching job was as an assistant with the
Purdue Boilermakers of
Purdue University in
West Lafayette, Indiana. The following year, he returned to College Station, Texas to become a Texas A&M Aggies assistant. Among other duties, Foldberg served as the Gators line coach. From 1960 to 1961, Foldberg served as the head football coach at the University of Wichita (now
Wichita State University) in
Wichita, Kansas, where his Wichita Shockers teams compiled a 16–5 record in two seasons, and won two consecutive
Missouri Valley Conference championships. After the 1961 regular season, he accepted an offer to become the head football coach and
athletic director at Texas A&M University, telling his Wichita Shockers players that it was the only job for which he would leave Wichita. He had previously turned down an offer from the
University of Nebraska to coach the
Nebraska Cornhuskers football team. Foldberg's 1961 Shockers were defeated 17–9 by the
Villanova Wildcats in the
Sun Bowl. Foldberg coached the Texas A&M Aggies football team for three seasons from 1962 to 1964. He was unable to duplicate his successful turnaround of the Wichita Shockers program, compiled an overall record of 6–23–1 as the Aggies head coach, and was replaced by
Gene Stallings after the 1965 season. He resigned as the Aggies' athletic director in July 1965. == Life after football ==