| Oberliga Mittelrhein 2017/2018 - Appearances as Referee |  |
 |
 |
||||
| 03/09/2017 | Viktoria Arnoldsweiler | - | SV Bergisch Gladbach 09 | 4:2 | - | - | - |
| 13/05/2018 | Borussia Freialdenhoven | - | Spvg Wesseling-Urfeld | 3:1 | 2 | - | - |
| Oberliga Mittelrhein 2017/2018 - Appearances as Referee | |
|
|
||||
| 03/09/2017 | Viktoria Arnoldsweiler | - | SV Bergisch Gladbach 09 | 4:2 | - | - | - |
| 13/05/2018 | Borussia Freialdenhoven | - | Spvg Wesseling-Urfeld | 3:1 | 2 | - | - |
| Complete name: | David Markus Koj |
| Born: | 26/09/1993 |
| Place of birth: |
Germany |
| Residence: | Wegberg |
| Nationality: |
Germany |
| Profession: | Beisitzer |
| Club: | Sportclub Wegberg 1912 |