This study aims to examine the mediating role of job satisfaction in the relationship between green motivation and turnover intention within the context of environmental Non-Governmental Organizations (NGOs). A quantitative approach was employed, collecting primary data via structured questionnaires from 52 active volunteers across five prominent local environmental NGOs in Surabaya. The data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM). The results reveal that green motivation does not possess a significant direct effect on reducing turnover intention. However, green motivation significantly increases job satisfaction, which subsequently exerts a strong negative effect on turnover intention, demonstrating that job satisfaction acts as a crucial full mediator. Practically, these findings imply that non-profit organizations cannot rely solely on shared environmental idealism to retain volunteers; they must proactively cultivate job satisfaction by establishing clear career development pathways and adequate structural support. This research provides novelty by addressing a critical gap in human resource literature, shifting the traditional focus from commercial industries to the unique, value-driven dynamics of volunteer retention in the non-profit sector.
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