The purpose of this study is to test differences and similarities of the public, private, and nonprofit sector employees by examining the antecedents and simultaneity of job satisfaction and job performance. The results, assessed by seemingly unrelated regression, showed that job satisfaction positively affects job performance, or vice versa. Explanatory variables such as goal ambiguity, leader-member exchange, and so forth also exerted significant effects on the outcome variables across three sectors. This study extends to explain the similarity and difference of three sectors based on the criteria of the values in common, outcome variation, task characteristics, and sector contexts.