On May 30 , 2012 he then became the head coach of the Eerste Divisie club De Graafschap .
He was then the head coach of FC Groningen for the 2010 -- 11 season .
On May 30 , 2012 head coach then became the head coach of the Eerste Divisie club De Graafschap .
He was then the head coach of FC Groningen for the 2010 -- 11 season .