Does personality impact differently on occupational choice and occupational performance? In a study of established teachers, interests, the Five-Factor Model, and attributions were examined in relation to occupational choice and performance. Attributions were assessed using a new instrument designed for teachers. Choice of teaching specialty was found to be most strongly associated with interest in the arts and sciences, openness to experience, and internal attributions in response to a positive classroom event. On the other hand, quality of teaching assessed by the National Board of Professional Teaching Standards (NBPTS) was associated (negatively) with business interests and with a tendency to externalize blame in response to a problematic teaching situation. Study findings suggested the hypothesis that broad traits located relatively high in a personality hierarchy influence trait matching in selecting an occupation, whereas more specific motivational/dynamic factors located lower in the personality hierarchy influence performance within the chosen niche. The report includes supplemental evidence on the construct validity of the personality measures for assessing teachers.