The phenomenon of consistently high performance among employees in the Packing Division of PT. Kao Indonesia Cikarang Pusat, despite the use of a traditional performance appraisal method, forms the background of this study. The research aims to analyze the effect of Employee Engagement and Work-Life Balance on Performance, with Job Satisfaction as a mediating variable. This study adopts a quantitative approach using a survey method, distributing questionnaires to 102 employees of the Packing Division at PT. Kao Indonesia Cikarang Pusat. Data were analyzed using Structural Equation Modeling (SEM) with LISREL 8.80 software. The results reveal that Employee Engagement and Work-Life Balance have a positive and significant effect on Performance; Employee Engagement has a positive and significant effect on Job Satisfaction; Work-Life Balance has no significant effect on Job Satisfaction; Job Satisfaction has a positive and significant effect on Performance; Job Satisfaction mediates the effect of Employee Engagement on Performance but does not mediate the effect of Work-Life Balance on Performance. These findings imply the importance of enhancing employee engagement and managing work-life balance appropriately to achieve optimal performance. The originality of this research lies in its focus on a division with fluctuating workloads and an attendance-based performance assessment based on targets and monthly production capacity, which is then converted to an annual basis, offering practical insights for similar organizations in managing human resources under such conditions.