In 1913 Mauthe was named the head coach for Gettysburg College and led that team to a 3–6–1 record. He later graduated from college with a degree in metallurgy. He then joined Youngstown Steel and Tube Co. and later became that company's president. In 1964 he was awarded Distinguished Alumnus Award by Penn State. He served on the board of trustees at both Penn State and Youngstown State University and established a scholarship at Penn State for engineering students. Mauthe was elected to the College Football Hall of Fame in 1957.