- The aim is to determine which are the competencies that undergraduate students of Psychology believe have developed throughout Professional Practice Apprenticeship and if these competencies from their perspective - may turn into a variety of useful skills for solving problems situated in different contexts. Professional Apprenticeship in Faculty of Psychology of Buenos Aires University has actually produced in undergraduate students the appropriation of strategies to widen their chances for a professional job when they graduate. A sample of seventy recently graduate psychologists are questioned about graduate courses, first job, specific field and settings of professional work, the career of Psychology and the challenges of professional education. Besides a procedure is applied, that investigates their own ways to analyse and solve situated problems in different contexts, as professional psychologists. The category of mental models, from the conceptual change theory of Rodrigo, integrates cognition and motivation, meaning, sense and action, subject and object, development and school, while the category of competencies that Perrenoud has built introduces the temporal and strategic dimensions and the issue of general and specific domains in knowledge and skills.