Psychosocial risk factors have become more visible in recent years as the impact of work on health has been increasingly recognized. This study aims to discuss the benefits of implementing a participative methodology based on a process of assessment of psychosocial risk factors in a Portuguese company in the retail sector. This process was carried out over a period of 8 months, with 58 head office workers from 11 departments, and 13 of their respective leaders, and was based on the use of a both qualitative and quantitative methodology which privileged the active involvement of the workers. The results showed that the psychosocial risk factors which had the greatest perceived impact on the decline in health of the head office workers were working time/schedules; demands and workload; work organization; recognition and rewards; career development and work-life balance. Another result of this study was the identification and validation of seventeen improvement proposals by the workers and leaders. It is, therefore, important to favor a methodological proposal that privileges the voice and work of those who are impacted by psychosocial risk factors daily, through moments of collective training and discussion about their work and its impact on psychosocial risk factors.