This paper aims at studying the process of the mobilization of the representation of their future job for training engineers. It attempts to show how this process can influence the investment in the training and, conversely how the training knowledge contributes to the evolution and the transformation of these representations. We propose the concept of socioprofessional representation and we describe it in its organizing principles in order to account for this representational process which plays an essential role in the professionalization.
This modeling, illustrated by research work concerning several engineering schools reveals some new emerging knowledge thus asserting the role of Social and Human Sciences in professionalizing training.