Koerner was the head baseball coach of the North Carolina Central Eagles (2012–2021).
[2] While at Medaille, Koerner helped develop the schools first ever North Eastern Athletic Conference Co-Player of the Year.
[3] Koerner then left the Mavericks to become an assistant for the Monmouth Hawks baseball program.
After just a single season at Monmouth, he accepted a position as an assistant and the recruiting coordinator for the Marshall Thundering Herd baseball team.
[5] On June 16, 2011, Koerner was named the head coach of the North Carolina Central Eagles baseball team.