[1] Campbell began his coaching career as graduate assistant at West Virginia Wesleyan College, from 2009 to 2010.

From 2012 to 2016, he was the offensive coordinator and assistant head coach at Alderson Broaddus University, a division II program.

[1] In January 2020, Campbell was hired to serve as the offensive coordinator and quarterbacks coach for Old Dominion University.

[4] He coached J. J. McCarthy to being named the Big Ten Quarterback of the Year and Michigan to a national championship that season.

[7] On February 25, 2025, Campbell was hired by Jim Harbaugh, joining the Los Angeles Chargers as an offensive assistant.