 Ramba uchiverenga ndima ino - Somutambi wechiduku, Mosaner akamiririra Italy mumakwikwi mana eWorld Junior Curling Championship. Akatamba wechitatu weItaly pa2012 World Junior Curling Championships, muchikwata chakatungamirwa naAndrea Pilzer. Chikwata chakapedza chiri chechipfumbamwe. Mosaner akabva ava kaputeni wechikwata chechidiki cheItaly pamakwikwi matatu anotevera eWorld Juniors. Pa2013 World Junior Curling Championships, Mosaner akatungamira timu yake yaPilzer, Daniele Ferrazza naRoberto Arman kunopedza 6th-nzvimbo 5-4 rekodhi. Pa2014 World Junior Curling Championships, akatungamira timu yake yaSebastiano Arman, Ferrazza naRoberto Arman kuenda kunzvimbo yechishanu, achirasikirwa mu tie-breaker kuSwitzerland. Pakupedzisira, pa2015 World Junior Curling Championships, akabudirira zvishoma, achitungamirira timu yake yaSebastiano Arman, Carlo Gottardi naFabio Ribotta kunopedza 8th-nzvimbo 3-6. 