Nadeau played in the 2018-19 [1] season for the North West Bulls Bantam of the New Brunswick Bantam AAA Hockey League (NBBAAAHL), raking in 44 points on 21 goals and 23 assists in 27 games, placing him 3rd in the points standings at the end of the season.
During the 2022–23 season, Nadeau led the Penticton Vees to their second consecutive Fred Page Cup championship awarded to the British Columbia Hockey League (BCHL) playoff winner.
[2] Nadeau committed to play college ice hockey for the Maine Black Bears during the 2023–24 season.
[7] On December 13, 2024, Nadeau was selected to represent Canada at the 2025 World Junior Ice Hockey Championships.
Bradly's older brother, Josh, is also an ice hockey player at Maine.