Non-teaching staff operates in schools regularly; they are permanent state staff called ATA (administrative-technical-auxiliary). Other professional figures can be provided (for example, psychologists, physicians, social assistants, etc.); however, they are not part of the school staff; they are employed by other institutions (communes, provinces, local health authorities, etc.) which collaborate with schools, sometimes also through special agreements.

The working conditions of the ATA staff at all school levels are regulated by the collective labour contracts. The ATA staff is organised at provincial level.

The number of units of non-teaching personnel in a school is set by the provincial directorate of education according to parameters set by law and criteria indicated by the Ministry. These criteria take into consideration the number of classes, the number of technical and science laboratories, gymnasiums and annexed national boarding schools, if any, in each school as well as the opening hours.