Vaas later went on to serve as the running backs and quarterbacks coach at the University of Notre Dame in 1990 and 1991 respectively.
He left Notre Dame to return to his alma mater, Holy Cross, serving as their head football coach in 1992.
Following Holy Cross, Vaas went to the Canadian Football League as the offensive coordinator for the Montreal Alouettes.
Vaas continued his coaching journey at Miami-Ohio serving as the OC in 2009 until he joined the University of South Florida football staff in 2010.
Vaas previously served (2014-2019) as a replay official and communicator for the American Athletic Conference (AAC).
Vaas returned to Allegheny College as the Gators' head coach in 1986, a position he held for four seasons, until 1989.
In 2020, Vaas was announced as the offensive assistant coach for Team 9, the internal farm team/practice squad of the revived XFL.