Had a decent run in the Eredivise in 17-18 which was his last job with Zwolle, finishing 9th. Didn't worked last season. Prior to that he coached in the A-league for 4 seasons which isn't exactly the pinnacle for a coach, but I remember him being highly rated in Australia and he left due to personal reasons.
According to who? You? Do you have an article of proof, or are you like the Greek newspapers pulling anything out of your a$s and stating it as fact? Maybe you mistaken his with:
The U21 NT will play a friendly against Germany in Zwickau on September 5. This is in preparation for the EURO qualifiers against Lithuania, Czech Republic and Scotland.