Stefan Seifert has been playing club mini golf since 2013 and currently works for BGV Backumer Tal Herten e. V., where he is also a member of the board and public relations officer.

In 2016, he won his first major title by winning the West German Combined Championship, which has the special feature that the tournament is played on two different course systems and is therefore more training-intensive. 

His national successes include the individual titles in his age category of seniors in 2022 and 2024, as well as winning the team title (2024).