He was the head coach of the Cornell Big Red football team from 1907 to 1908, compiling a record of 15–3–1.

Returning to Cornell, he served as a graduate coach before leaving to enter a law firm in Milwaukee, Wisconsin.

Schoellkopf began his career as a football player at the Cascadilla School, where he played fullback.

While playing at Harvard, Schoellkopf was 23 years old, 5 feet 10 inches tall, and weighed 183 pounds.

[6] After the 1903 college football season, Schoellkopf was selected as a first-team All-American fullback by Fielding H. Yost,[8] Charles Chadwick,[9] and the San Antonio Daily Light.

In two years as Cornell's coach, Schoellkopf compiled a record of 15 wins, three losses and one tie.