 Pari gbolohun ti o tẹle: Ellis bẹrẹ iṣẹ kariaye rẹ pẹlu Ilu Kanada nipa gbigba awọn ami ẹyẹ goolu mẹta ni ọdun 2008 ni Ipenija Hockey U17 Agbaye, IIHF World U18 Championship ati Ivan Hlinka Memorial Tournament. Ni ipele labẹ 20, Ellis ti ṣe awọn ifarahan mẹta ni Awọn idije Agbaye Junior, ti o gba wura ni ọdun 2009 ati fadaka ni ọdun 2010 ati : Ọdún 2011. Oun ni oludije ti o ṣe aṣeyọri julọ ni gbogbo akoko laarin awọn olugbeja ati oludari ti o ṣe iranlọwọ fun Canada ni gbogbo igba. Ó tún gba góòlù pẹlú Ẹgbẹ agbábọọlù Canada ní ìdíje World Championships 2016. 