Régimbald-Gagné was drafted in the fifth round, 35th overall by the Saskatchewan Roughriders in the 2012 CFL Draft and signed with the team on May 31, 2012.[2] After attending training camp with the Roughriders in 2012, he returned to play CIS football for the Sherbrooke Vert et Or for a fifth year.[1] He re-signed with the Roughriders on May 17, 2013.[1] After beginning the 2013 season on the practice roster, Régimbald-Gagné played in his first professional game on August 17, 2013, against the Montreal Alouettes. He played in eight regular season games where he recorded six special teams tackles.[3] He also played in one playoff game and recorded a special teams tackle, but was on the injured list when the Roughriders won the 101st Grey Cup.[3] He became the first former Vert et Or player to win a Grey Cup championship.[4]
In 2014, Régimbald-Gagné played in just six regular season games and recorded four special teams tackles.[3] His season came to an end after he suffered a torn medial collateral ligament and torn meniscus in his right knee.[5] In 2015, he had his best professional season as he played in 17 regular season games and had seven defensive tackles and eight special teams tackles.[3]
Montreal Alouettes
On February 12, 2016, Régimbald-Gagné signed a one-year contract with the Montreal Alouettes.[6] However, he was released by the Alouettes before training camp on May 2, 2016.[7]
Coaching career
Régimbald-Gagné joined his alma mater, the Sherbrooke Vert et Or, in 2016 to serve as an assistant coach for the team.[8] In 2017, he was named the team's special teams coordinator and served in that role for six seasons.[8] On November 22, 2023, it was announced that Régimbald-Gagné had been promoted to head coach.[9]