Lachat won the Swiss Junior Curling Championships in 2020 with his team of Jan Klossner, Theo Short and Anthony Petoud.

[3] At the Worlds, Team Switzerland finished the round robin with a 8–5 record which qualified them for the playoffs as the sixth seed.

[6] Next, the team represented Switzerland at the 2021 European Curling Championships where they finished the round robin with a 5–4 record, failing to advance to the playoffs.

[8] After a strong 3–1 start to the tournament, the team lost four straight games, ultimately finishing in seventh place with a disappointing 4–5 record.

A new team was then created consisting of Lachat, Sven Michel, Yannick Schwaller and Benoît Schwarz for the 2022–23 season.