During his junior career, Mosaner also skipped the Italian men's team. He led his teammates of Pilzer, Ferrazza and Roberto Arman to a 12th-place finish at the 2013 European Curling Championships. His team had much more success at the 2014 European Curling Championships. After finishing the round robin in 2nd place with a 7-2 record, they then lost all of their playoff games, including the bronze medal match, settling for 4th. This placement qualified Italy to play in the 2015 Ford World Men's Curling Championship. The team would add veteran Joel Retornaz to skip the team for the Worlds, with Mosaner throwing last rocks. There, the team finished 10th. The next season, the team finished 8th at the 2015 European Curling Championships, failing to qualify the country for the Worlds. For the 2016-17 season, Mosaner moved to the third position on the team. They finished 7th at the 2016 European Curling Championships, and qualified for the 2017 World Men's Curling Championship. There, Mosaner resumed his position throwing fourth rocks on the team, which finished 9th overall.