The current period is seeing a growing proportion of "activist" workers who have expressly chosen their occupation in response to the need to defend collective interests and provide solutions to social and environmental problems. They hope to find in the so-called "hybrid organizations" combining market activity and social mission a framework for aligning their values and their profession. However, the divergent logics at work in these organizations tend to subject them to significant tensions, amplified or attenuated by the organizational context. We explore the responses to these tensions and the organizational practices that can support these workers. We identify how the individual gives meaning to persistent contradictions through storytelling. We demonstrate the organizational support made possible by the provision of CSR standards. We test the impact of personal social engagement on satisfaction with CSR and the intention to "blow the whistle" in case of perceived ethical drift, compared to other antecedents.