<![CDATA[This study investigates how training and development, social support, and career development influence employees’ work performance, with organizational commitment as a mediating factor. The research was conducted at the Witness and Victim Protection Agency (LPSK) in Jakarta, involving 305 respondents selected through purposive sampling. Descriptive statistics were used to summarize the data, and hypotheses were tested using Structural Equation Modeling (SEM) with AMOS version 24. The findings indicate that training and development significantly enhance both organizational commitment and work performance, underscoring the value of skill improvement and continuous learning. Social support was also found to positively affect employees’ commitment and performance, highlighting the importance of a collaborative and supportive work environment. Furthermore, career development contributes positively to organizational commitment and work performance, emphasizing the role of clear growth opportunities in motivating employees. Organizational commitment itself was shown to have a direct positive effect on work performance and mediates the relationships between the three factors and employee performance. These results suggest that LPSK can improve overall performance and commitment by implementing targeted training initiatives, fostering a supportive workplace culture, and providing structured career advancement opportunities. This comprehensive approach is expected to strengthen employee engagement, enhance productivity, and sustain organizational effectiveness in the long term. Keywords: Training and Development; Social Support; Career Development; Work Performance ; Organizational Commitment]]>
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