[2][3] He previously competed for Switzerland at the World Junior Curling Championships, playing in the 1998 and 1999 editions.

After that stint, he decided to focus on pursuing a business administration degree at University of St.

[5] Haller has been in contact with the former Swiss curler brothers Enrico and Marc Pfister and have often proposed competing together for the Philippines but were hindered by the lack of a fourth player.

After novice Alan Frei joined they formed a new federation, Curling Pilipinas in 2023 and were able to debut at the 2023 Pan Continental Curling Championships Division B tournament placing second..[6][2] They gained promotion to Division A after placing first in the 2024 tournament.

[9] Haller after graduating worked at Ernst & Young for two years before moving to the Zurich Cantonal Bank.