The congruence between the personality types postulated by Holland and managerial traits was investigated. The Vocational Preference Inventory was used to determine the personality types of the subjects selected for the study and a management assessment system to determine their managerial traits. When the degree of personality differentiation was taken into account, meaningful differences were found between realistic and the conventional personality types in respect of initiative and between the artistic and the conventional personality types in respect of analytic, planning and organizing ability. No statistically significant difference between the personality patterns of high and low potential managers could be found, except in respect of the realistic scale. This result indicates that low potential managers possess more realistic characteristics than high potential managers. In general, the findings of this study provide little support for Holland’s formulations of the personality types.