PurposeResearch findings stress the importance of adapting prevention mechanisms to the contexts experienced in the workplace. This paper presents the development and implementation of a knowledge portal that includes a range of Internet-based resources to support the prevention measures implemented by occupational health and safety (OHS) union delegates. It describes the process used to develop a knowledge portal that takes into account the needs of communities and unions as well as the constraints expressed.Design/methodology/approachThe approach chosen for this project was action research, in which data collection results in various readjustment loops that allow for reflection and situational assessment. Data were collected from documentation, meetings, questionnaires and focus groups. The readjustment loops led to the implementation of a solution based on sustainability.FindingsAfter studying the context, needs and constraints, the results suggest that for a knowledge portal to stand out, it must be consistent with classroom training, include a pedagogical approach that facilitates the transfer of knowledge, be interesting to all workers, be able to adapt to the characteristics of users and use technologies that reach across time, space and connection tools.Originality/valueThis knowledge portal is the result of interactions and collaborations between the university and the community, an interesting way to develop a solution. It sheds light on the fact that the action research process needs to be documented throughout the process and creation cycles in order to facilitate the sharing of the results obtained.