Lengkepan kalimah di handap ieu: Nielsen meunang medali emas di 1997 FIBA Under-21 World Championship jeung timnas junior Australia. Manéhna ogé anggota tim basket nasional senior Australia. Kalawan timnas senior Australia, anjeunna meunang medali emas di 2001 Goodwill Games, 2003 FIBA Oceania Championship, jeung 2005 FIBA Oceania Championship. Manéhna ngawakilan Australia di 2004,
Olimpiade 2008 jeung 2012.