Jan Siewert (born 23 August 1982) is a German professional football coach and former player who manages Greuther Fürth.
[1][5] In January 2019, he was linked with the vacant manager's position at Premier League club Huddersfield Town,[6][7] and later that month he was appointed to the role, signing a contract until the summer of 2021.
[11] Huddersfield gained one point from their first three league games in the 2019–20 season and were knocked out of the EFL Cup first round by Lincoln City and on 16 August 2019, after one win during 19 games in charge, Siewert was sacked.
[14][15] On 28 December 2020, Siewert was appointed as interim manager of Mainz's first team in the Bundesliga after Jan-Moritz Lichte was dismissed.
[18][19] On 22 December 2023, Mainz announced that Siewert had been made permanent manager of the club.