This study examines the complex relationship between environmentally oriented leadership, public sector management quality, environmental policies, and supply chain performance within the public sector context in Indonesia. The research combines quantitative analysis and qualitative insights from key stakeholders to explore these dynamics comprehensively. The findings underscore the multifaceted nature of supply chain performance optimization, where environmentally oriented leadership demonstrates a nuanced connection to performance outcomes. Public sector management quality significantly enhances efficiency and overall supply chain performance. Notably, well-structured environmental policies positively impact supply chain performance and contribute to organizational sustainability. However, a weak policy framework can dilute the positive influence of leadership. The moderating effect of environmental policies on the relationship between management quality and supply chain performance might be less pronounced. The implications of this study offer both theoretical and managerial insights. The findings emphasize the need for holistic supply chain management strategies that integrate leadership styles, management practices, and policy frameworks to achieve sustainable performance outcomes. The study acknowledges limitations related to the specific context and variables studied. Future research can explore broader variables, diverse sectors, and regions by enhancing the understanding of these complex interactions. The novelty of this study lies in its comprehensive examination of the intricate relationship between leadership, management quality, policies, and supply chain performance within the public sector context, contributing to the growing body of knowledge in this vital area.