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PT Hartono Istana Teknologi (PT HIT) faces serious employee performance issues, as refrigerator production realized only 80% of the monthly target in 2022. This negative trend continued through 2024–2025, including rising absenteeism, increasing defect rates, and declining productivity per employee. This study examines the influence of Work Environment and Work Motivation on Employee Performance with Job Satisfaction as a mediating variable based on Herzberg's Two-Factor Theory. Data were collected via purposive sampling from 100 permanent production employees of PT HIT and analyzed using path analysis with SPSS. Work Environment and Work Motivation each positively and significantly influenced Job Satisfaction. Work Environment, Work Motivation, and Job Satisfaction also positively and significantly influenced Employee Performance. Job Satisfaction partially mediated the effects of Work Environment and Work Motivation on Employee Performance at PT HIT. Keywords: Work Environment, Work Motivation, Job Satisfaction, Employee Performance.