Abstract EN:

The doctoral work analyzes two main social worlds and under worlds, inside the realm of professional training, into which the positions of trainers in further education for adults are defined : the world of state-orientated policies, which includes the under worlds of insertion and continuous support policies, on the one hand ; the world of formation in big firms which includes the under worlds of technical formations, consulting and self development, on the other. These worlds do not have the same history. They were shaped inside the political dynamic of the three " French matrix of professional training " : the 1959 laws on social mobility aimed at promoting rise in the social scale ; the " continuous professional training laws " (1971) ; the " life-long professional training laws " (2004). Each of them historically created patterns of professional trainers who took part in the structuration of the professional group studied. Three main professional segments are involved in the current process : the field-trainers, the formation consultants and the formation managers. These segments are themselves divided according to the many missions, patterns and conceptions of professional training. The thesis tackles the question of a problematic common identity between these professionals : are they nothing but a chaotic cluster of individuals with nothing in common ? Using a longitudinal approach it shows how identical careers, which connect the segments and the social worlds, can be traced in these various professional worlds. These careers allow field-trainers who started working in low positions to access to the most prestigious jobs, such as experts in big firms.