| 3. Liga 2009/2010 - Appearances as Referee |  |
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| 28/07/2009 | Borussia Dortmund II | - | Eintracht Braunschweig | 0:0 | - | - | - |
| 06/09/2009 | Bayern München II | - | SV Wehen Wiesbaden | 0:0 | 1 | - | - |
| 06/02/2010 | FC Ingolstadt 04 | - | VfL Osnabrück | 0:0 | 7 | - | - |
| 03/04/2010 | Rot-Weiß Erfurt | - | Erzgebirge Aue | 0:0 | 6 | 1 | 1 |
| Complete name: | Guido Winkmann |
| Born: | 27/11/1973 |
| Place of birth: |
Germany |
| Residence: | Kerken |
| Nationality: |
Germany |
| Profession: | Polizeibeamter |
| Club: | SV Nütterden |
| Height: | 180 cm |
| Weight: | 71 kg |
| Bundesliga (GER) appearances: | 161 |
