Based on a social cognitive approach to personality, the role of domain-specific efficacy beliefs were examined in two studies. Study 1 developed a measure of expectations about success in 10 different domains of common work activities with domain-specific expectancy ratings obtained for 157 individuals along with self- and peer ratings of personality. Results showed that predictable relationships emerged, with the traits of the five-factor model being important determinants of construct-relevant efficacy beliefs. Study 2 focused on expectations about activities related to conscientiousness as a link between personality and performance across jobs. Results (N=97) confirmed the proposed relationships and found that efficacy beliefs about trait-relevant tasks functioned as a mediator linking conscientious and supervisor ratings of performance.