The APTS sometimes joins coalition to support broader issues, in line with the convictions of the majority of its members.
The APTS was officially founded on March 18, 2004, out of the merger of two unions: the Association professionnelle des technologistes médicaux du Québec (APTMQ), which had 5,000 members, and the Centrale des professionnelles et professionnels de la santé (CPS), which had 10,000 members.
These two organizations decided to join forces in order to better combat frequent and undesired changes imposed by new legislations.
In 2015, following the merger of more than 180 establishments in Quebec's health and social services network caused by Bill 10, the APTS was once again forced to conduct a union allegiance campaign.
In 2022, the APTS joined with the FTQ, CSQ and CSN, as part of the Front commun intersyndical de 2023.