Hello. I haven't really delved into. He was born in Germany and lives in Namibia, that's why I've made such a conclusion. Anyway at least for 9+7 years he's Namibia-based. There are also references to his activity in local sources: ,  + his profile in the Namibian segment of LinkedIn.
In the absence of any evidence of nationality, we should leave that question open. Wikipedia is not so much about believes than about facts. ;-) Greetings, --Zinneke (Diskussioun) 07:35, 20. Okt. 2016 (UTC)Äntweren[äntweren]