Marcel Rapp (born 16 April 1979) is a German former professional footballer who played as a centre-back or as a midfielder and who is the head coach of Bundesliga club Holstein Kiel.

[6] The coaching trio won 3 of their last 4 matches and finished the season in 6th place, qualifying directly for the Europa League.

At the beginning of October 2021, Rapp took over at second-division club Holstein Kiel as the successor to interim coach Dirk Bremser, who had been in charge of the team for 2 matches following the resignation of Ole Werner.

[7][8] At the time of his takeover, Holstein Kiel were in 15th place with 8 points after 2 wins, 2 draws and 5 defeats on matchday 9 of the 2021–22 season.

[9] On 11 May 2024, he steered the club to their inaugural promotion to the Bundesliga, clinching a top-two finish with a 1–1 draw against third-placed Fortuna Düsseldorf.