After sitting out a year to complete his studies, he reached out to a member of the Montreal Alouettes front office, did a private workout, and was promptly signed to his first pro contract. For the 2017 CFL season, Dozier recorded 60 defensive tackles, including two sacks, as well as 14 special teams tackles. He also scored a touchdown on a 20-yard fumble return. He was the team's nominee for the league's Most Outstanding Rookie award. In 2018, he played in 17 games while recording 84 defensive tackles, 18 special teams tackles, and five interceptions en route to being named a 2018 CFL Eastern All-Star at safety. He was released by the Alouettes on May 13, 2019.
