He then served as the head coach of the Northeastern State (2012–2015) and the Austin Peay Governors (2016–2022).
After two seasons at Butler, Janssen transferred to New Mexico State University where he continued his baseball career.
[2] Janssen served as a graduate assistant with the Kansas State Wildcats baseball program in 1997.
On June 29, 2011, Janssen was named the head coach of the Northeastern State University baseball team.
[3] On September 16, 2015, Janssen was named the head coach of the Austin Peay Governors baseball program.