He currently plays for St Gallen Women, wearing the number 8 shirt. At the international level, he represents Switzerland Women U17. He plays primarily as a Forward.

In the Switzerland Women's Division 1 2025-2026 season, Lia ammann scored 3 goals and provided 0 assists across 13 appearances, averaging 0.2 goals per game with 0 shots attempted and 0 on target.