The aim of the study is to investigate how field secretaries work preventively against juvenile delinquency. The study also intends to investigate how field secretaries interact with other societal actors in their work. Field secretaries meet adolescents in their natural context and thus have the opportunity to create relationships within youth arenas. The basis of preventive work is important for adolescents to be established in society, which can thus counteract criminal development. The data collection method used is semi-structured interviews. The empirical data consists of six field secretaries from Sweden, the empirics have been transcribed and been analyzed by using two theories. The theories for the study are stamp theory and systems theory. Stamping theory has provided an understanding of how stamping processes can advance continued crime. System theory has instead illustrated interaction between different systems and how it affect the individual. The results of the study show that field secretaries do not use a specific way of working to prevent juvenile delinquency. The opportunities that field secretaries find with their work are about their accommodating approach and encouraging adolescents to use their abilities, while one of the challenges is that they do not know if it prevents delinquency. The results also highlight the importance of collaboration to be able to work preventively.