He currently plays for Bischofswerdaer FV, wearing the number 36 shirt. He plays primarily as a Midfield.

His most recent move was a from Bischofswerdaer FV to Aufbau Deutschbaselitz on 2025-07-01.

Across 13 appearances in the German U19 Youth League 2023-2024, Mathis Seifert registered 0 goals and 0 assists, while completing 0 key passes out of 15 total passes with a passing accuracy of 0.7.