Sinkgraven spent a number of years as assistant manager at FC Zwolle, before taking charge of the Indonesian Olympic team in 2006. Sinkgraven left a year later, returning to the Netherlands to coach at the women's football club of SC Heerenveen, before managing FC Emmen for a year.
Sinkgraven took charge of Canadian soccer team FC Edmonton in December 2010 until he was released by the club in September 2012.[2]
Personal life
His son Daley is also a professional footballer.[3]