Because of the partial role of academic training in the management of the uncertainty associated with the profession of performer, the analysis of the professional integration of musicians is most complex. This research is intended to understand how the transition is made between the academic training and the professional market, especially among brass musicians. Thus, this study is based on a fieldwork conducted with the Montreal’s Ensemble Magnitude6, a brass quintet with drums consisting of students being professionalized and of established professionals. This article has three parts: the first one gives an individual portrayal of the five respondents, intended to bring out the common and distinct features from their profile. The second part consists of an analysis of the professionalization strategies used by Magnitude6’s musicians, based on the concept of uncertainty’s management. The final part will review the role of academic training in these professionalization strategies.