| Youth Championship 2012/2013 - Appearances as Referee |  |
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 |
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| 13/06/2013 | Bayern München | - | Hansa Rostock | 0:2 | 1 | - | - |
| Youth Championship 2012/2013 - Appearances as Referee | |
|
|
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| 13/06/2013 | Bayern München | - | Hansa Rostock | 0:2 | 1 | - | - |
| Complete name: | Thorben Siewer |
| Born: | 05/07/1987 |
| Place of birth: |
Germany |
| Residence: | Drolshagen |
| Nationality: |
Germany |
| Profession: | Controller |
| Club: | FC Schreibershof |