Aaron Kramer will be Cole Custer’s crew chief in the NASCAR Cup Series next season at Haas Factory Team.

Kramer is currently the lead engineer on the No. 17 team for Chris Buescher at RFK Racing where he has been since 2021. Previously, Kramer worked on the No. 6 team as the secondary race engineer. He has been with RFK Racing since 2016 and his other roles include electoral and data systems engineer and lead race engineer on the Xfinity Series program.

RKF Racing will have an alliance with Haas Factory Team in 2025. Kramer will join the organization at the conclusion of the season.