[1] He was named to the under-17 Australian National Team and won an Asia-Pacific Games Silver Medal.

[6][7] Dufelmeier was selected to the All-tournament team, and also received the Charles Sesher Sportsmanship Award.

[7] Upon completion of his NJCAA eligibility, Dufelmeier signed with NCAA Division II CUI.

[19] In September 2024, Dufelmeier joined the Cairns Taipans as an injury replacement for Taran Armstrong ahead of the 2024–25 NBL season.

[21] Dufelmeier joined the Chennai Heat of the Indian National Basketball League (INBL) for the 2025 season.

[22][23] Dufelmeier's father, Tad, also played in the NBL for the Canberra Cannons as an American import.