The purpose of this study was to examine the relationship of the psychological empowerment of security guards to their service orientation and organizational performance. The subjects in this study were 300 security guards who were selected by purposive sampling from the population that consisted of the workers in private security agencies located in the cities of Chungan and Ahsan in 2011. After a survey was conducted, the answer sheets from 271 respondents were analyzed. The statistical package SPSS WIN 18.0 was employed to make a factor analysis, reliability analysis, multiple regression analysis and path analysis. The findings of the study were as follows: First, psychological empowerment affected service orientation. Better meaning and better self-determination led to better service human resources management, better service leadership and better service encounter management. Second, psychological empowerment exerted an influence on organizational performance. Stronger impact and better meaning led to stronger organizational commitment, higher job satisfaction and better performance. Third, service orientation had an impact on organizational performance. Better service human resources management, better service leadership and better service encounter management were followed by stronger organizational commitment, better job satisfaction and higher performance. Fourth, psychological empowerment exercised a firsthand and secondhand influence on service orientation and organizational performance. Given the findings of the study, managers of security agencies should keep in mind the unique working environments of employees, and they should empower employees to show what they can do in consideration of their changing working environments and let them assume the responsibility for their own job performance. That will encourage them to provide better service for customers, which will serve, in turn, to bolster the organizational performance.