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High schools and post-baccalaureate careers guidance have been marked by a number of recent major reforms, presented as innovations serving the needs of high school students themselves, with the introduction of the Parcoursup system in particular. These reforms have increased the individualisation of pathways and the rationalisation of guidance in a broader context of territorial inequalities in access to employment. By tracking cohorts of high school students in Normandy, we examine the links and combined effects of students’ socio-territorial origin and motility on the construction of their career plans and choices in the light of the selective and competitive processes of ParcourSup. By reconstructing an indicator of social position for each of the 1,000 secondary school students surveyed and using a large number of qualitative variables from the questionnaire, we will shed light on the links and changes between the profiles of secondary school students and their career aspirations.