The aim of the presentation is to recognize the professionalization and new tasks of probation officers; to point out the sense of health, psychosocial determinants including psychological well-being, which is measured by the frequency of experiencing happiness and self-efficacy at work; to describe and diagnose the levels, differences of self-efficacy and the importance of psychological well-being at work due to the nature of the profession. The study of probation officers (N = 544) included psychological well-being, which is closely related to everyone's quality of life. The characterization of work activity and culture and work organisation in the context of the high stressfulness of the occupational role based on measures of psychological well-being provides interesting conclusions about the linkś between the perceived level of happiness and the effectiveness in terms of enduring the psychological burden of the occupational role. Research methods: survey research, document analysis, interviews with experts. Research tools: Copenhagen Psychosocial Questionnaire - COPSOQ II, Generalized Self-Efficacy Scale - GSES, survey questionnaire, interview dispositions. The project is of exploratory importance for this area of knowledge. It can be a useful source for theoreticians, practitioners, as well as institutional probation organizers. The results of the research will be used to create an optimal model of support for the helping professions taking into account contemporary changes and social processes, taking into account the welfare of the ultimate recipients of their interventions.