Abstract: In the literature on the social implications of technology much attention is paid to methods to include the perspective of stakeholders and end users. In the present paper I explore the scientists and technical researchers’ own opinions on social and moral issues related to technology. On the basis of a qualitative case study, I investigated how the actors within a research network distribute responsibilities for moral and social issues. The results show that the researchers’ moral background theories are better predictors of the argumentation style than their specific role within the project. This indicates that the prevailing image of professional co-operation in network organizations is too one-sidedly focused on the protection of one’s own interests and needs adjusting.