He began representing France in senior international competition in 2021, and has competed at the 2022 and 2023 World Artistic Gymnastics Championships.

[2] In August, Osberger represented France at the 2018 European Men's Artistic Gymnastics Championships in Glasgow, United Kingdom.

Osberger made his senior international debut at the 2021 FIG World Challenge Cup in Osijek, Croatia in June.

[4] He later participated at the FIG World Challenge Cup in Koper, Slovenia, held in September.

In August, he represented France at the 2022 European Men's Artistic Gymnastics Championships, held at the Olympiahalle in Munich, Germany.