Kammala jumla mai zuwa: Nielsen ya lashe lambar zinare a 1997 FIBA Under-21 World Championship tare da 'yan wasan matasa na Australia. Ya kuma kasance memba na manyan 'yan wasan kwallon kwando na Australiya. Tare da manyan 'yan wasan kasar Australia, ya lashe lambobin zinare a Wasannin Kyauta na 2001, Gasar FIBA Oceania ta 2003, da Gasar FIBA Oceania ta 2005. Ya wakilci Australia a gasar 2004,
Wasannin Olympics na shekara ta 2008 da 2012.