Career
His football-career started at Wageningen and De Graafschap Doetinchem. He was bought by Ajax Amsterdam by leaving Ajax-coach Rinus Michels at the end of the 1975/1976 season. He went to Ajax summer 1976, simultaneously with Hans Erkens and Johan Zuidema and has been by far the most successful of the 3 midfielders, their first Ajax-coach being Tomislav Ivic.
Also he has been captain of Ajax (1983–1984 and 1984–1985, his 9th and final season at Ajax).
In the period 1976-1985 Ajax also lost 3 Dutch Cup-finals (KNVB Cup-finals) (seasons 1977-1978, 1979–1980, 1980–1981). Summer 1985 Schoenaker went to play for Football Club Twente Enschede, where he ended his career.
Schoenaker obtained a total number of thirteen caps, scoring six goals.