Public service motivation (PSM) has a documented, positive effect on job satisfaction—especially in the public sector. However, organizational characteristics such as red tape, hierarchical authority, and the absence of organizational goal specificity, which are often more present in public sector organizations, may have negative influences on the PSM–job satisfaction relationship. This study explores the impact of these organizational characteristics on sector differences in the PSM–job satisfaction relationship in a “hard case” setting. Using survey data with low-level, white-collar employees, we confirm a positive PSM–job satisfaction association in the public sector compared with the private sector, where we see a negative association. Furthermore, perceived red tape and the absence of organizational goal specificity have negative influences on job satisfaction; nevertheless, sector differences remain in the PSM–job satisfaction relationship when controlled for these organizational characteristics. This suggests that public or private sector status is more important for the PSM–job satisfaction relationship than other organizational characteristics.