After one year in Visp, Casserini joins Sierre as of the upcoming season. The defender spent the majority of his career with HC Ajoie (eight consecutive seasons, from 2013 untill 2021), before joining Visp last year. For them, he played 27 games, scoring three assists.
Casserini is a product of HC Ambì-Piotta's youth organisation and suited up in more than 170 National League games for the Biancoblù in the earlier stages of his career.