As well as Anderlecht, Croon coached in Netherlands and Belgium with DWS, VER, HVC, FC Volendam, K.S.V. Waregem, Lierse S.K. and NEC. His Anderlecht side won the 1976 UEFA Cup Winners' Cup with a 4–2 victory over West Ham United on February 5 1976 at Heysel Stadium in Brussels.
He died in February 1985 at the age of 49 following a car crash.