Kammala wannan jumla: Siegenthaler ya yi gasa tare da Team Switzerland a 2013, 2014 da 2015 IIHF World U18 Championships. An san wasan nasa na ban mamaki lokacin da aka sanya shi a cikin 2015 U18 WJC All-Star Team. An kuma zaɓe shi ya halarci taron
Gasar tunawa da Ivan Hlinka ta 2014.