The imperative to achieve corporate sustainability necessitates a novel business perspective focusing on the competencies of leaders and the efficiency of Green Human Resource Management (GHRM) implementation. This study aims to underscore the importance of leadership and GHRM in advancing enterprises towards sustainability. GHRM assists organizations in aligning corporate strategies with the external environment, a critical aspect of organizational management. The research employs a quantitative methodology and a dyadic approach, specifically examining the supervisor-employee relationship, to collect data. A standardized survey was utilized to gather data from staff in non-profit organizations in Indonesia. Hypotheses were tested through Structural Equation Modelling-Partial Least Squares (SEM-PLS). The findings reveal a significant impact of leadership on employees' environmentally conscious behaviour. Moreover, the relationship between leadership and employees' green actions is mediated by GHRM and aligned ecological aspirations. Additionally, green creativity strengthens the connection between leadership and GHRM. Furthermore, a psychologically green atmosphere enhances the association between GHRM and employee engagement in green activities. The research outcomes bear substantial practical significance for leaders and policymakers involved in business sustainability.