 Engineering and its myths 
If the professionalization of the social professions is increasingly based on the model of professionalization engineering, what are the imaginaries underlying this movement? How can we understand that the profession of engineer, the one who, at least in the imagination, invents and designs machines with a magically predictable functioning, can be the model for designing training systems for the helping professions? This contribution proposes to explore these questions through two mythological figures often summoned when it comes to engineering and technology : Prometheus and Hephaestus. These two figures will help us to move from the model of professionalization engineering to ingenium.