Sigma was formed in 2005 by Constantine and
Bobby Smyrniotis as a private academy aimed to develop young Canadian soccer players. Over the years Sigma have sent players from their academy to the NCAA and to trials overseas. When
League1 Ontario was formed in early 2014, Sigma announced they would be entering their senior academy team to compete as part of
inaugural season. They were one of the three
Ontario Soccer Association Recognized Non-Club Academies permitted to enter a team in the league, along with
ANB Futbol and
Master's FA. The Mississauga-based League1 Ontario teams - Sigma FC and
North Mississauga SC (and formerly the now-Brampton-based
ProStars FC) - compete annually for the Credit River Cup, awarded by the Sauga City Collective supporters group, with the team's matches against each other during the L1O deciding the victor. Sigma made news in January 2015 when academy player
Cyle Larin was drafted first overall by
Major League Soccer club
Orlando City at the
2015 MLS SuperDraft. This was the first time a Canadian went first overall in an
MLS draft. On October 1, 2018, Sigma co-founder Bobby Smyrniotis was named head coach and technical director of
Canadian Premier League club
Forge FC. Bobby had served as technical director and first team head coach of Sigma from 2005 to 2018. 16 members of Forge's 2019 roster had played for Sigma in the past. In 2023, they formalized their affiliation with
Canadian Premier League club
Forge FC, which enables Forge to send players to Sigma on short-term loans throughout the season. == Seasons ==