Several predictors of occupational choice derived from a theory of careers (Holland, 1973) were examined. Hypotheses that a person's competencies, activities, self-estimates, interests, and vocational choices can be organized by a six-category typology to understand and predict subsequent choice were tested. Samples of 894 men and 989 women took the Self-directed Search (SDS) at entry into two colleges and reported their occupational choices one or three years later. All hypotheses received support, although the predictions varied in efficiency. Other analyses indicated that current vocational choice is the best predictor of later choice, and that scores based on sex-specific norms are less efficient predictors than raw scores. The findings support both the theory and the validity of the SDS assessment for men and women. Extrapolations from these conclusions are limited by the nature of the criteria and the population tested (College students). (Author/PC)