Career as a coach
| Period | Team | Country | Position | |
|---|---|---|---|---|
| 07/2024 - 06/2025 |  | Aberdeen WFC |  Scotland | Manager |
| 07/2019 - 06/2020 |  | Huddersfield Town |  England | Ass. Coach |
| 10/2019 - 12/2019 |  | South Korea |  South Korea | Manager |
| 02/2017 - 06/2019 |  | Ireland |  Ireland | Manager |
| 07/2016 - 02/2017 |  | SC Sand |  Germany | Manager |
| 01/2016 - 07/2016 |  | Avaldsnes IL |  Norway | Manager |
| 07/2013 - 12/2015 |  | Eintracht Frankfurt | Germany | Manager |
| 07/2011 - 06/2013 |  | SC 13 Bad Neuenahr | Germany | Manager |
| 07/2006 - 04/2011 |  | TuS Koblenz II | Germany | Manager |
| 12/2008 - 06/2009 |  | TuS Koblenz | Germany | Ass. Coach |
| 07/2006 - 04/2009 |  | TuS Koblenz U19 | Germany | Manager |
| 07/2005 - 11/2005 |  | Preußen Münster | Germany | Manager |
| 07/2001 - 01/2005 |  | 1. FSV Mainz 05 II | Germany | Manager |
| 07/2000 - 06/2001 |  | VfL Hamm/Sieg | Germany | Manager |
| 04/2000 - 06/2000 |  | Waldhof Mannheim | Germany | Ass. Coach |
| 03/1999 - 03/2000 |  | Dynamo Dresden | Germany | Manager |
| 07/1996 - 03/1999 |  | 1. FC Köln | Germany | Ass. Coach |
| 07/1989 - 06/1996 | | TuS Koblenz | Germany | Manager |
National teams managed
| Season | Team | Position | |
|---|---|---|---|
| Friendlies 2024 | | South Korea | Manager |
| World Cup 2023 Australia/New Zealand | | South Korea | Manager |
| Friendlies 2023 | | South Korea | Manager |
| Friendlies 2019 | | South Korea | Manager |
| U17 EURO Qualifiers 2018/2019 | | Ireland U17 | Manager |
| World Cup Qualifiers Europe 2017/2018 | | Ireland | Manager |
| Friendlies 2017 | | Ireland | Manager |
Career as a player
| Period | Team | Country | Position | |
|---|---|---|---|---|
| 07/1987 - 06/1989 |  | 1. FSV Mainz 05 | Germany | Defence |
| 07/1982 - 06/1987 | | VfL Hamm/Sieg | Germany | Defence |
| 07/1981 - 06/1982 |  | Leicester City | England | Defence |
Club matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2. Bundesliga | 19 | 14 | 5 | 2 | 1.295 | - | - | - | 7 | - | - | » All matches |
| DFB-Pokal | 2 | 2 | - | 1 | 200 | 1 | - | - | - | - | - | » All matches |
| Promotion Round 2. Bundesliga | 5 | - | 5 | - | 108 | 1 | 1 | - | - | - | - | » All matches |
| Total | 26 | 16 | 10 | 3 | 1.603 | 2 | 1 | - | 7 | - | - |