 Killen akaita mutambo wake wepasi rose weNew Zealand panguva ye2000 OFC Nations Cup, uye akaverengerwa muchikwata cheNew Zealand U23 pakuonekwa kwavo kumaOlympics eZhizha ra2008 semumwe wevatambi vatatu vepamusoro. Akatumidzwawo sechikamu cheNew Zealand squad ye2002 OFC Nations Cup, 2003 uye 2009 FIFA Confederations Cup, uye 2010 FIFA World Cup. 