Jan Thielmann is a 24-year-old professional football player from GER. He currently plays for FC Köln, wearing the number 29 shirt. At the international level, he represents Germany U21. He plays primarily as a Defender. He stands at 178cm tall and weighs 72kg. His preferred foot is Right. His current market value is estimated at 5M €.

His most recent move was a from Koln U19 to FC Köln on 2020-01-17.

Throughout the Bundesliga 2025-2026, Jan Thielmann featured in 19 matches, averaging 0.8 tackles, 0.6 interceptions, and 1.9 clearances per game, while blocking 0.3 shots per game.