He also had a spell in the Premier League for Manchester City as well as playing for VfB Stuttgart, VfL Bochum and SC Freiburg He earned 19 caps[1] for Germany and was in the squad at Euro 1992.

As a manager Frontzeck has had spells in charge of Alemannia Aachen, Arminia Bielefeld, Borussia Mönchengladbach, FC St. Pauli, Hannover 96 and 1.

[2] He played for the Germany national team from 1984 to 1992 in a total of 19 games and won a runners-up medal in UEFA Euro 1992.

He was head coach of Alemannia Aachen from 13 September 2006[3] until the end of the season 2006–07 when he resigned due to the club's relegation.

[7] Following the loss against FC St. Pauli on 13 February 2011 Frontzeck was released as head coach by the club management of Borussia Mönchengladbach.

[14] To finish out the 2014–15 season, Hannover defeated FC Augsburg[15] and SC Freiburg,[16] both by a 2–1 scoreline,[15][16] and two draws against VfL Wolfsburg[17] and Werder Bremen.

[25] On 6 June 2021 Frontzeck joined VfL Wolfsburg as assistant to the newly appointed manager Mark van Bommel.