Sénécal played football at Collège André-Grasset in Montreal, Quebec. He threw for a CEGEP record 3,116 yards in 2017, earning CEGEP Rookie of the Year honors. He was named CEGEP MVP in 2018. Sénécal suffered a season-ending torn ACL in the first game of the 2019 season. He played in 19 career games, completing 63 percent of his passes for 5,976 yards, and 59 touchdowns.[1]
Sénécal then played U Sports football for the Montreal Carabins. He won the Hec Crighton Trophy in 2023 after leading Montreal to a 7–1 regular season record while completing 69.6 percent of his passes for 2,215 yards, 15 touchdowns and four interceptions.[6] He was also the first player in school history to win the Hec Crighton.[7] Sénécal was named a first team All-Canadian as well.[8] On November 25, 2023, a few days after winning the Hec Crighton, he helped Montreal win the 58th Vanier Cup by defeating UBC by a score of 16–9. He was named the Vanier Cup MVP after completing 11 of 26 passes for 171 yards and one interception while rushing for a team-leading 50 yards and a touchdown.[9] Sénécal was named the male U Sports Athlete of the Year for the 2023–24 season.[10]