Flick started his career as a player for FC Bayern Munich in 1985 and played for them until 1990. With the club, he won four Bundesliga titles and one German Cup.
- Then go to. FC Cologne and played for them until his retirement in 2002. He participated in 148 Bundesliga matches and scored five goals.
He did not have the opportunity to play for the German senior national team, but he did play twice for the U-18 team.
Flick started his coaching career as an assistant for Victoria Baumenthal, an amateur league club. Then he trained Hoffenheim, Victoria Salzburg and Ingolstadt.
In 2006, he joined manager Joachim Loew as assistant to the German national team. He helped lead the Manshafts to third place in the 2006 and 2010 World Cups, and to win the 2014 World Cup.
In 2014, he left his position as an assistant and became the sports director of the German Football Association. He resigned from this position in 2017.
- In 2019, he joined Bayern Munich as an assistant to Niko Kovac, then took over the temporary directorate after Kovac's dismissal. He led Bayern to an impressive six titles: the Champions League, the Europa League, the Europa League, the Europa League,