Green Human Resource Management (GHRM) techniques have emerged as a crucial method for improving organisational performance, driven by the increasing awareness of environmental challenges and the need for sustainable growth. In this study, we look at how Public Sector Undertakings (PSUs) in Chhattisgarh use GHRM strategies to boost their performance and promote sustainable development. Incorporating environmental considerations into HRM allows PSUs to boost performance indicators generally while also coordinating their operations with worldwide sustainability targets. Key stakeholders from several PSUs in Chhattisgarh were surveyed quantitatively and interviewed qualitatively as part of the study's mixed-method approach. Finding out how much organisational efficiency, employee happiness, and environmental stewardship are helped along by GHRM methods including green recruiting, training, performance management, and employee engagement is the main goal of this study. Organisational performance is improved once GHRM policies are implemented due to more employee engagement, lower operational costs, and better environmental compliance. By encouraging environmentally conscious actions and cultivating an organisational culture of sustainability, these activities also contribute to the SDGs. In order to fill a gap in the literature, this study examines the impact of GHRM practices on Indian PSUs and provides policymakers and business executives with actionable advice on how to include sustainability into HR strategy. The findings of this research show that GHRM practices have the ability to help public sector organisations succeed and grow sustainably.