Harmeson was the 18th head football coach for the Lehigh Engineers, now the Lehigh Mountain Hawks, in Bethlehem, Pennsylvania and he held that position for eight seasons, from 1934 until 1941. His overall coaching record at Lehigh was 23 wins, 42 losses, and 5 ties. This ranks him ninth at Lehigh in terms of total wins and 18th at Lehigh in terms of winning percentage.