This study aims to analyze the effect of Human Resource Development and Work Environment towards Employee Performance Improvement PDAM Surya Sembada City Of Surabaya (Study of the Corporate Secretary Sub-Directorate) partially and simultaneously. The authors used a saturated sampling technique or also called a census, where all members of the population are sampled, as many as 55 employees in all Sub-Directorate of Corporate Secretary PDAM Surya Sembada City Of Surabaya. Data collection

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... es using questionnaires and interview. In calculating scoring, researchers used a Likert scale. Method data analysis used is multiple linear regression analysis. The results of this study show that the variable Human Resource Development (X1) and Work Environment (X2) have a significant effect on Employee Performance Improvement (Y) partially. Human Resource Development (X1) and Environment Variables Work (X2) also have a significant effect on Employee Performance Improvement (Y) simultaneously.