As well as Anderlecht, Croon coached in the Netherlands and Belgium with DWS, VER, HVC, FC Volendam, K.S.V.

He later succeeded compatriot Kees Rijvers at Beringen, with whom he suffered relegation from the Eerste Klasse.

[4] In 1995, it was reported that Croon was persuading players to take drugs during his short tenure at FC VVV.

[5] After retiring from football, Croon joined the Bhagwan movement and named himself Shunyam Avyakul.

[6] He died in February 1985 in a Rotterdam hospital at the age of 48 following a car crash near Arnemuiden a week earlier.