As described in EHC Winterthur's press release, Mario Antonelli holds a professional trainer diploma and is a social pedagogue with a master's degree. He also has various management experiences and diplomas in adult education and mental coaching, also in the context of ice hockey.
Antonelli has been working in professional and junior ice hockey for years. He has been a development and mental coach for several clubs in Switzerland (ZSC, Lausanne, Kloten etc.) as well as for the Swiss national teams (U20 to U15) for many years. In the 2019-20 season, Antonelli held the position of team manager of EHC Bülach (MySports League).