After completing his education, Allen then was the one who started the University of North Carolina's Tar Heels soccer program from 1947 to 1976.
His career with the team remains impressive to this day as he was the coach who led the team with a .667% win record and won a championship in the Southern Conference in 1948, co-champion in the Atlantic Coast Conference in 1968, and came in 2nd place in ACC play 9 times - to which they never placed lower than 4th in all their times playing.
Allen obtained a number of prestigious positions not only with the University of North Carolina, but also with the National Soccer Coaches Association of America (NSCAA).
Not only did he become the first coach for the Tar Heels program in 1940, he also obtained a position as a Physical Education Instructor which then soon led him to become a professor in 1964.
[citation needed] While also a player and a coach, Allen received an education from the University of North Carolina.