Favreau just completed his first season as head coach of the Drummondville Voltigeurs in the Quebec Major Junior Hockey League (QMJHL) after six seasons as head coach (2021-2023) and assistant coach (2017-2021) with the Halifax Mooseheads of the QMJHL. This season, he led the Voltigeurs to a QMJHL championship and a participation in the Memorial Cup. The team finished atop the Western Conference in the regular season.
Prior to his time in the QMJHL, he was an assistant coach (2009-2011) and head coach (2011-2015) with the Gloucester Rangers in the Central Canada Hockey League (CCHL), as well as head coach and hockey operations director for the Cumberland Grads of the CCHL for two seasons (2015-2017). Favreau won a gold medal as assistant coach with Canada's U18 summer national team at the 2023 Hlinka-Gretzky Cup and served as assistant coach for Team Canada Black and head coach for Team Canada White at the 2018 and 2019 editions of the World Under-17 Hockey Challenge, respectively.