This research explores the relationship between employees’ disposition and several important job attitudes. Dispositional affect is a personality trait that describes people’s emotional responses to situations. This study explored how affective disposition influences the job attitudes of work engagement, organizational commitment, and job satisfaction. Data were collected from a sample of librarians, and the results show that affective disposition strongly predicted the three job attitudes in the expected directions. The findings contribute to knowledge of the role of personality in the workplace and provide guidance for library managers on how best to facilitate positive job attitudes.