 During nearly ten professional seasons, Hermann played with SV Werder Bremen.He made his Bundesliga debut on 11 December 1982, in a 2–1 win at VfL Bochum, but it would be only his only appearance of the season, and he would also amass a single one in the following.After a slow start, Hermann became a very important defensive member, often partnering legendary Miroslav Votava in central midfield.