The main focus of this research is to measure the professionalism and work performance of the commissioned officer: the mediating role of work values. The study was conducted out using non-experimental quantitative research methodology employing the descriptive-correlational approach using Mean, Pearson r, Regression, and Sobel z-test as statistical tools. Mediation analysis was used as an approach in data analysis. Mediation model was used to find and explain the mechanism or process that underlying an observed connection between independent variables which is the professionalism and a dependent variable which is the work performance by introducing a third explanatory variable, known as a mediator variable which is the work values. The research instrument utilized were customized and being appropriated to the needs of the current study. The information was gathered using a stratified random sampling approach, with 300 police non-commissioned officers serving as respondents. The study found a substantial association between professionalism and work performance. Likewise, work values also show significant role. It also revealed that there is mediating effect of work values of police commissioned officers on the relationship between professionalism and work performance and partial mediation occurred on this study.

Keywords : Criminal Justice Education, Professionalism, Work Performance, Work Values, Correlation, Path Analysis, Sobel Z-Test, Mediation, Philippines