| Oberliga Mittelrhein 2012/2013 - Appearances as Assistant | ||||
| 02/09/2012 | Alemannia Aachen II | - | Hilal Maroc Bergheim | 2:3 |
| 07/09/2012 | SF Troisdorf | - | Germania Windeck | 2:3 |
| 30/09/2012 | FC Hürth | - | VfL Alfter | 5:2 |
| Oberliga Mittelrhein 2012/2013 - Appearances as Assistant | ||||
| 02/09/2012 | Alemannia Aachen II | - | Hilal Maroc Bergheim | 2:3 |
| 07/09/2012 | SF Troisdorf | - | Germania Windeck | 2:3 |
| 30/09/2012 | FC Hürth | - | VfL Alfter | 5:2 |
| Complete name: | David Markus Koj |
| Born: | 26/09/1993 |
| Place of birth: |
Germany |
| Residence: | Wegberg |
| Nationality: |
Germany |
| Profession: | Beisitzer |
| Club: | SC Wegberg 1912 |