A native of Evansville, Indiana, Doerner attended Mackey High School and was a stand-out basketball player. In three years on the team, he earned all-county and all-sectional accolades twice apiece, and in his senior year was named a team captain. When he graduated in 1938, he decided to stay close to home and attend Evansville College (now known as the University of Evansville). He played on the Purple Aces basketball team for all four years, lettering each season.
