Vocational Education and Training (VET) in Sweden suffers from a significant decline in interest. Many employers experience difficulties in recruiting skilled workers. Young people miss the opportunity of a potentially rewarding career. This problem has resulted in a variety of attempts and reforms to counteract the problem, not at least within work-place supervision. When it comes to the workplace-based part of VET the focus has been to educate workplace supervisors. For the importance of high quality VET the workplace-based part of it is essential and, the supervisors have a central role. Supervisors, like teachers, work with expectations to educate and develop vocational knowledge, vocational identity and socialize the students into the vocation. As the state has focused on educating supervisors, and earlier research on the relation between supervisors and vocational teachers the contribution of this study is to study the supervisors in action. The aim of the study is to contribute with knowledge about how the supervisor take on their role in the workplace-based part of the with regards to how they socialize students into the vocation, develop their vocational identity and knowledge. For the sake of getting close to the supervisors an ethnographic approach is adopted. The case taken is workplace supervisors within the Building and Construction Program's focus on house painting in Sweden.