The present study took place at a prestigious national college. The participants were 116 students (41 boys, 75 girls), attending either gymnasium or high school—two classes from each school cycle. The main objective was to test a set ofcognitive ability scales, specifically created for career counselling, in conjunction with the personality inventory NEO PI-R and the career interest questionnaire SDS. The main hypothesis was that a series of career predictors will significantly improve vocational choice. The results partly confirm our expectations. The effect of the intervention is significant: For all the participants the degree of career congruence improved on average with 4 points.