The research is based on theoretical analyses which come to clarify field reports and search results. It presents the current dynamics of work and marks out the link between the meaning and the real-life experience of work. The shift from a collective conception to a very individual apprehension of the profession leads to think of the emergence of a new model of worker, entrepreneur of himself. The field of the social sector profession world is presented as an example, a sort of laboratory for the analysis of the transformations. The implemented methodology on three different but articulated grounds here, is essentially qualitative; thus giving the opportunity to retranscribe the words of the actors in this specific field where the relation is essential. The theoretical and methodological anchoring of this thesis allows to conceive the interest of the detour by the meaning of work so as to conceive new practices of human resource management which re-give evidence of the centrality and value of work both for the individual and for the organization. Decisive key factors for the conduct of activities are highlighted and structured around two large managerial orientations: The reintroduction of the dialogue in working collectives inspired by the planning for trades method, The implementation of meaning-oriented management by building cooperation within professions and organizations, that is where work condenses.
