| Youth B Bundesliga Nord/Nordost 2007/2008 - Appearances as Referee |  |
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| 06/10/2007 | Hannover 96 | - | Werder Bremen | 0:2 | 3 | - | - |
| 17/05/2008 | Werder Bremen | - | Energie Cottbus | 4:1 | 3 | 1 | - |
| Youth B Bundesliga Nord/Nordost 2007/2008 - Appearances as Referee | |
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| 06/10/2007 | Hannover 96 | - | Werder Bremen | 0:2 | 3 | - | - |
| 17/05/2008 | Werder Bremen | - | Energie Cottbus | 4:1 | 3 | 1 | - |
| Complete name: | Thorben Siewer |
| Born: | 05/07/1987 |
| Place of birth: |
Germany |
| Residence: | Drolshagen |
| Nationality: |
Germany |
| Profession: | Controller |
| Club: | FC Schreibershof |