 Wellington before moving to Australia, helping Marconi Stallions to consecutive National Soccer League titles in 1988 and 1989.De Jong then took advantage of his heritage, joining Fortuna Sittard in the Dutch Eredivisie (First Division) in 1990, playing against the likes of Romario and Dennis Bergkamp.De Jong played three seasons in the Dutch top flight (53 games; 6 goals) and one more in the Eerste Divisie (Second Division).