Cika wannan jumla: Siegenthaler ya yi gasa tare da Team Switzerland a gasar cin kofin duniya na 'yan wasa na' yan wasa na 'yan wasa na' yan wasa na 'yan wasa na 'yan wasa na' yan wasa.
2013, 2014 da kuma 2015 IIHF Duniya U18 gasar zakarun Turai. An san wasan nasa na ban mamaki lokacin da aka sanya shi a cikin 2015 U18 WJC All-Star Team. An kuma zaɓe shi don shiga gasar tunawa da Ivan Hlinka a shekarar 2014.