| Regionalliga Nord 2017/2018 - Appearances as Assistant | ||||
| 13/08/2017 | VfV Hildesheim | - | Hamburger SV II | 0:2 |
| 26/11/2017 | Altona 93 | - | Lüneburger SK Hansa | 0:1 |
| Regionalliga Nord 2017/2018 - Appearances as Assistant | ||||
| 13/08/2017 | VfV Hildesheim | - | Hamburger SV II | 0:2 |
| 26/11/2017 | Altona 93 | - | Lüneburger SK Hansa | 0:1 |
| Complete name: | Alexander Sieker |
| Born: | |
| Place of birth: |
Germany |
| Residence: | Rinteln |
| Nationality: |
Germany |