Recent mental health (MH) reforms have had a sharp impact on practices among MH professionals. A deeper understanding of factors contributing to their job satisfaction, in this context, may help improve quality and continuity of care. The purpose of this study was to identify variables associated with job satisfaction for 315 MH professionals in Quebec (Canada) after implementation of wide-ranging MH reforms. Job satisfaction was measured with the Job Satisfaction Survey. Independent variables were conceptualized within five domains: 1) Professional Characteristics, 2) Team Attributes, 3) Team Processes, 4) Team Emergent States, and 5) Organizational Culture. Univariate, bivariate and multivariate analyses were performed. Job satisfaction was significantly associated with absence of team conflict, stronger team support, better team collaboration, greater member involvement in the decision-making process (Team Processes), Affective commitment toward the team (Team Emergent States), as well as lack of a market/rational culture (Organizational Culture). Job satisfaction was strongly related to team processes and, to a lesser extent, team emergent states.