After graduating from Wayne State College, Entz began his coaching career as the defensive coordinator at Illinois College in 1998. He then joined Wayne State College as their assistant head coach and linebackers coach in 1999.
Winona State
In 2002, Entz was hired as the assistant head coach, defensive coordinator and linebackers coach at Winona State University under head coach Tom Sawyer.
Northern Iowa
In 2010, Entz was hired by the University of Northern Iowa as their defensive line coach under head coach Chris Klieman. In 2012, Entz was promoted to defensive coordinator.
Western Illinois
In 2013, Entz was hired as the assistant head coach, defensive coordinator and defensive line coach at Western Illinois University under head coach Bob Nielson.
North Dakota State
In 2014, Entz was hired as the defensive coordinator at North Dakota State University, reuniting with head coach Chris Klieman. He would hold this position for five seasons. In 2018, Entz was named as the 31st head coach at North Dakota State University, following Klieman's departure in to become head coach at Kansas State University.[2] During his five-season tenure as head coach at North Dakota State, Entz led the football program to the playoffs in all five years, ending in two national championships, a runner-up finish, along with a semifinal and quarterfinal appearances. His overall record was 60–11 with a 15–3 playoff record.
USC
On December 10, 2023, Entz was named assistant head coach for defense and linebackers coach at the University of Southern California (USC) under head coach Lincoln Riley.[3] He remained at NDSU for the remainder of the 2023 playoff run which ended the next Saturday at Montana in the FCS semifinals.