| 3. Liga 2021/2022 - Appearances as Assistant | ||||
| 16/04/2022 | FC Viktoria 1889 Berlin | - | MSV Duisburg | 0:1 |
| 07/05/2022 | 1. FC Saarbrücken | - | FSV Zwickau | 1:1 |
| 14/05/2022 | VfL Osnabrück | - | 1. FC Magdeburg | 1:5 |
| 3. Liga 2021/2022 - Appearances as Assistant | ||||
| 16/04/2022 | FC Viktoria 1889 Berlin | - | MSV Duisburg | 0:1 |
| 07/05/2022 | 1. FC Saarbrücken | - | FSV Zwickau | 1:1 |
| 14/05/2022 | VfL Osnabrück | - | 1. FC Magdeburg | 1:5 |
| Complete name: | Stefan Zielsdorf |
| Born: | 17/08/1989 |
| Place of birth: |
Germany |
| Residence: | Haselünne |
| Nationality: |
Germany |
| Club: | SpVg Hülsen-Westerloh |
| Height: | 186 cm |