After the Liberation of France, he graduated from the École polytechnique (1945–1948), after which he joined the Corps of Air navigation as an engineer.
[4][5][6] Villiers remained involved with the development of the system, designed to require as little instruction and effort from the operator as possible.
Villiers invented the Digitatron, a touch input device which allows operators to modify the flight plans of aircraft.
In 1970 Villiers became director of Northern region aeronautics, leaving the direction of CENA to his deputy, Dominique Alvarez.
Villiers remained involved with CENA and furthered his interest in the automation control system, preparing several reports[10] and numerous articles in journals or international conferences.