Treille will serve as an assistant coach and thus support head coach Jan Cadieux in his tasks. His contract will expire at the end of the 2022-23 season. Treille had been coaching for the French federation since the 2018-19 season. He served as an assistant coach of the first team as well as the head coach for the U20 national team.
Mathieu Vouillamoz, for his part, has been loaned to HC Ajoie for the season. He can, however, be recalled by Genève-Servette HC if they should need some players. The 22-year-old forward recorded one goal and two assists in 49 regular-season games for GSHC last season.