This study examines the determinants of security guards’ job satisfaction in Singapore. Specifically, data gathered from 251 security guards and security supervisors are analyzed to assess how job and organizational characteristics such as autonomy, supervisory support, innovation, pay and benefits, and support from other employees (non-security) affect the participants’ job satisfaction. In addition, given the nature of their work that brings them in close contact with citizens, the authors examine to what extent the environmental factor of perceived citizens’ views of security guards helps explain the level of satisfaction. The findings suggest that job autonomy, pay and benefits, and perceived support from other employees in the organization are strong predictors of participants’ job satisfaction.