| U20 Friendlies 2018 - Appearances as Referee |  |
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| 27/03/2018 | England | - | Portugal | 3:0 | - | - | - |
| U20 Friendlies 2018 - Appearances as Referee | |
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| 27/03/2018 | England | - | Portugal | 3:0 | - | - | - |
| Complete name: | Siemen Mulder |
| Born: | 23/11/1983 |
| Place of birth: |
Netherlands |
| Residence: | Uithuizen |
| Nationality: |
Netherlands |