Andros' coaching career included stops as an assistant at
Oklahoma,
Kansas,
Texas Tech,
Nebraska,
California, and
Illinois. His
bowl games as an assistant were the
Sun Bowl in January
1956 with
Texas Tech and the
Rose Bowl in January
1959 with
California.
Idaho Andros became a head coach at age 37 at
Idaho in February
1962. He took over in
Moscow for
Skip Stahley, who stepped down after eight seasons and remained as athletic director. Andros' starting annual salary was just under The 1962 team was 2–6–1, but the
following year he led Idaho to its first winning season (5–4) in a
quarter century. The tenth and final game in 1963 at
Arizona State on November 23 was canceled, following the
assassination of President Kennedy. The Vandals won their opener in
1964, but then lost four straight, the latter two were close ones to
Oregon and
Oregon State. The loss to the
Rose Bowl-bound Beavers in Corvallis came by a late third quarter OSU punt return. The Vandals rebounded and the next week won the
Battle of the Palouse for the first time in a decade, defeating neighbor
Washington State The Cougars were led by first-year head coach
Bert Clark, a former Sooner teammate; the Vandals split the final four games to finish at 4–6. While Idaho had been a driving force in the founding of the
Big Sky Conference in 1963, it was primarily to alleviate
basketball scheduling and the Vandals remained an
independent for football through 1964 under Andros. Only one conference foe was played during the first two Big Sky seasons, a 1963 game with
Idaho State that was previously scheduled. Idaho was in the University Division, while the other Big Sky members were in the College Division (which became
Division II in
1973) for football. After Andros left, Idaho began conference play in
1965 under head coach
Steve Musseau, Andros' defensive coordinator. Andros spent three years on the
Palouse at Idaho, with an overall record of . One of his first-year hires at Idaho in 1962 was alumnus
Bud Riley then the head coach and athletic director at
Lewiston High School, south of Moscow. A former Vandal halfback for
Dixie Howell, he coached the Idaho freshman team for Andros and went with him to OSU in 1965. Riley was a defensive assistant in Corvallis for eight years before moving on to the
Canadian Football League in 1973 and became a head coach the following year. His eldest son
Mike (b.1953) was the head coach at Oregon State for fourteen seasons and later at
Nebraska.
Oregon State Andros was hired as the head coach at Oregon State in February He replaced the legendary
Tommy Prothro, who left after ten seasons in Corvallis for
UCLA, just ten days after leading the Beavers in the
Rose Bowl. Andros compiled a record in eleven seasons at OSU. In the
Civil War games against the
Oregon Ducks, he won his first seven and split the last four, for an overall record of Andros was nicknamed "
The Great Pumpkin" for his bright orange jacket and large physical size, It was his first game on the Palouse since he left Idaho; his last Palouse game as Vandal head two years earlier was also a win over the Cougars, 28–13. but improved his situation in Corvallis. Although it wasn't apparent at the time, Andros' tenure at Oregon State crested with the 1968 season. Following two six-win seasons in 1969 and 1970, his teams would only win a total of 13 games in the next five years, the start of 28 straight losing seasons. ==Later life and family==