The present study investigates the relationship between two career-related variables and occupational expertise of higher-level employees from large working organisations in three different age groups. The factors in question are: total number of jobs that have been performed; and the average period spent in each job. Survey data from 420-higher level employees and 224 direct supervisors have been utilised. We may conclude that it is not experience as such that counts for the development of occupational expertise. We assume that it is rather the allocation of different jobs that determines competence growth. Results are considered in relation to possible explanations of the outcomes.