He served as the head football coach at the First District Agricultural School of Jonesboro, Arkansas—now known as Arkansas State University—from 1922 to 1923 and at Marshall College—now known as Marshall University—from 1931 to 1934, compiling a career college football record of 18–29–3.
From 1922 to 1923, Dandelet coached at the First District Agricultural School in Jonesboro, Arkansas, where he compiled an 0–13–1 record.
Returning to the Tri-State (West Virginia, Ohio and Kentucky) area, Dandelet played for semi-professional football teams like Armco Steel in Catlettsburg, Kentucky, and with early National Football League teams like the Ironton (Ohio) Tanks and Portsmouth (Ohio) Spartans (today's Detroit Lions organization), while coaching football at his alma mater, the Wonders of Ceredo-Kenova High School in nearby Wayne County, West Virginia.
After being released as football coach to make way for Cam Henderson to assume the Herd football and basketball jobs, Dandelet remained as a professor in the Health, Physical Education and Recreation Department and was also Dean of Men through 1950 at Marshall College.
Dandelet died of a heart attack at his home in Huntington, West Virginia on March 30, 1950.