Pari gbolohun ti o tẹle: Siegenthaler dije pẹlu Ẹgbẹ Switzerland ni
2013, 2014 àti 2015 IIHF World U18 Championships. Idaraya rẹ ti o tayọ ni a mọ nigbati a darukọ rẹ si Ẹgbẹ 2015 U18 WJC All-Star. O tun ti yan lati kopa ninu idije Ivan Hlinka Memorial Tournament 2014.