Past research has suggested that dispositional sources of job satisfaction can be traced to measures of affective temperament. The present research focused on another concept, core self-evaluations, which were hypothesized to comprise self-esteem, generalized self-efficacy, locus of control, and nonneuroticism. A model hypothesized that core self-evaluations would have direct effects on job and life satisfaction. It also was hypothesized that core self-evaluations would have indirect effects on job satisfaction. Data were collected from 3 independent samples in 2 countries, using dual source methodology. Results indicated that core self-evaluations had direct and indirect effects on job and life satisfaction. The statistical and logical relationship among core evaluations, affective disposition, and satisfaction was explored.