This study aims to analyze the effects of system quality and information security on internal user satisfaction, with ease of access as a mediating variable in the employee digital system of customs and excise regional office I of east java. This study employed a quantitative approach using a survey method. The population and sample consisted of 194 employees selected through saturated sampling. Data were collected using a Likert-scale questionnaire and analyzed using Partial Least Squares Structural Equation Modeling with SmartPLS. The results show that system quality and information security have positive and significant effects on ease of access. Ease of access, system quality, and information security also have positive and significant effects on internal user satisfaction. Furthermore, ease of access partially and complementarily mediates the effects of system quality and information security on internal user satisfaction. The R-Square value of 0.661 indicates that system quality, information security, and ease of access explain 66.1% of the variance in internal user satisfaction. These findings confirm that improving user satisfaction requires a digital system that is reliable, secure, and easily accessible.
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