There are countless challenges to which workers are subjected, especially those who have to deal with waste-a source of social exclusion. Several studies highlight work accidents and the psychosocial impacts to which these workers are exposed, however Fernando da Braga Costa, inaugurates by defining a term for the psychosocial and political suffering of these workers: public invisibility. Due to innovation and theoretical reading about this phenomenon, there is a shortage of interventionist studies. Thus, we sought to understand how the transformative agency can be promoted and how it manifests itself discursively during a formative intervention conducted in the activity of variation in the interior of São Paulo. Therefore, in this study, we chose the methodology of the Change Laboratory as research-intervention, which is based on the Theory of Activity and systematically promoting the participation of workers in the transformation of their work activity. As a way to achieve these objectives, the speeches produced from the transcripts of the Change Laboratory sessions between 2017 and 2018 were observed. The data were analyzed from the content analysis and discourse analysis supported