He is the offensive coordinator and quarterbacks coach for Buena Vista University, positions he has held since 2024.

[1] He served as the head football coach at Briar Cliff University from 2008 to 2016, compiling a record of 21–78.

He was the second head coach in the history of the Briar Cliff Chargers football program, succeeding Dick Strittmatter.

A native of El Dorado, Kansas, Rethman graduated from Knox College in Galesburg, Illinois in 1992.

[2][3] This biographical article relating to a college football coach first appointed in the 2000s is a stub.