Thomas Klasen (born 16 September 1983) is a German professional football manager and former player who is the head coach of Regionalliga Südwest club Eintracht Trier.
On 6 February 2018, Luxembourg's top-tier club CS Fola Esch announced his appointment as head coach, with a contract running until 30 June 2020.
[13] In June 2023, Eintracht Trier, recently relegated from the Regionalliga, appointed Klasen as head coach for the 2023–24 season.
[14] Under his leadership, the team achieved an immediate return to the Regionalliga, securing the Oberliga championship in dominant fashion with seven matchdays remaining in the season.
[15] In 2015, while serving as player-coach for FC Karbach, Klasen pursued a degree in primary education with a focus on German language and sports.