From 1975 a phenomenon is growing. It consists of a slow but inexorable increase of the proportion of engineering students called "civilians" in opposition to the "officials" (civil servants) engineering students. ENAC is becoming a major player in the training for aerospace industry (civilian personnel), while its primary purpose was only the training of officials for "direction générale de l'aviation civile". It is true that the existence of students for the private sector is not new at the university : it was in 1956 that are off the first of them. At the end of the 1950s, however, this recruitment is subsidiary and affects only a minority of students. It is primarily intended to offset the disadvantage which consists of the highly fluctuating number of students to serve in the Administration and to prevent the size of successive promotions with a too great disparity. However, this second source tends to become more and more important, to finally become dominant. This results in an overhaul of the teachings. ENAC engineering education, particularly that of the specialty called "facilities" – it focuses on electronics – convince the industrial sectors of electronics and information technology. Without having particularly desired, the university is gradually invested with the role of National "Grande Ecole" of Engineers.