ABSTRACT: This study aims to analyze the effects of WLB and the physical work environment on health workers’ performance at public health centers (Puskesmas) in Barito Kuala Regency, with job satisfaction as a mediating variable.A quantitative causal design was applied with a saturated sample of 130 health workers (physicians, nurses, and midwives). Data were collected using questionnaires and analyzed through Structural Equation Modeling (SEM) with SmartPLS 3.0. The findings show that WLB significantly influences both performance and job satisfaction. The physical work environment significantly influences job satisfaction but does not directly influence performance. Furthermore, job satisfaction significantly impacts performance and mediates the effects of both WLB and the physical work environment on performance. Job satisfaction is a key factor mediating the relationship between WLB, the physical work environment, and performance. Practically, health center management should strengthen work-life balance policies, improve physical working conditions, and enhance job satisfaction to optimize health workers’ performance.

Keywords: Work-Life Balance, Physical Work Environment, Job Satisfaction, Performance, Health Workers.