The club joined the Canadian Soccer League in 2018 with a team in the First Division.

[6][7] Goalkeeper Senad Poračanin scored the opening goal in a 2–0 victory over Brantford Galaxy on September 7, 2018, on a penalty kick.

[8] They finished their debut season in seventh place in the nine-team league, qualifying for the playoffs.

[10] The club also provided free soccer workshops to Dufferin-Peel Catholic District School Board students.

[12] Mississauga would fail to secure a playoff berth after finishing ninth in the divisional standings.