Building on a theoretical framework that links characteristics of individuals and their work settings to organizational commitment (OC) and citizenship behavior, this study considers why faculty may be disengaging from institutional service. Analyses of survey data collected from a state system of higher education suggest that job characteristics, exchanges and social learning are associated with faculty members' OC. For instance, opportunities for advancement and research support, as well as responsiveness of administrators to faculty, contributed to the likelihood that faculty would accept a position at their institution again if given the chance. Commitment, however, did not significantly affect time spent on institutional service. Two job characteristics--time spent on research and time spent on teaching--were negatively associated with this behavior.