Employee recognition is an old concept, linked to motivation and health in the workplace. This study is based on the definition of the concept proposed by Brun and Dugas (2008) and adopts an empirical perspective comparing two French organizations from two different sectors: a public research agency and a private R&D center. This research focuses on the recognition of activities of expertise, intellectual professions and knowledge workers and more specifically on the forms of recognition adapted to researchers. The qualitative methodology on the one hand, has highlighted the significance of the “invisible college” and the internal level of recognition. On the other hand, the ambivalence between the recognition of the results and the individuals is revealed as well as the importance of the social type of interaction. This study offers different perspectives regarding the recognition of knowledge workers.