Gotta wonder what his track record was with Schalke wrt player development. He was there when they got relegated, though. Not sure if he was the man in charge of hiring managers, but they went through several during their path towards relegation.
It looks like he was hired right before Schalke fired Tedesco, who got them to a 2nd place finish the year before and to the round of 16 in the Champions League. Tedesco has also done well at RBL since taking over for Marsch there. But I dont know what his role in that was.
That said, I think its hard to judge his Schalke career bc they had so many financial issues that predated his arrival. RB Global knows him, so personally Im hopeful, if not necessarily confident.