This research investigates the impact of Green Human Resource Management (GHRM) practices on fostering sustainable development within the Libyan National Oil Corporation, against the backdrop of global trends urging the integration of environmental considerations into managerial and organizational strategies. Adopting a descriptive–analytical design, the study is anchored in the Ability–Motivation–Opportunity (AMO) framework, which provides a robust theoretical basis for elucidating the mechanisms through which HRM practices contribute to sustainable institutional transformation. The independent construct, GHRM, was conceptualized through five key dimensions: green recruitment, green training and development, environmental performance appraisal, environmental incentives, and green participation. Sustainable development, as the dependent construct, was assessed across four dimensions: environmental, economic, social, and technological. Data were collected using a structured questionnaire distributed to a purposive sample of 91 employees within the general administration of the corporation. The results, derived from descriptive and inferential statistical analyses, revealed that the overall implementation level of GHRM practices averaged 3.16, with environmental incentives exhibiting the highest relative performance. The sustainable development construct achieved an overall mean of 3.09, reflecting a moderate yet acceptable level of adoption. Furthermore, regression analysis confirmed statistically significant positive associations between all dimensions of GHRM and sustainable development. Among these, green training and development emerged as the most influential predictor, explaining of the variance (R² 48.1%). The findings substantiate the argument that GHRM serves as a strategic lever for embedding sustainability within organizational systems. Accordingly, the study recommends the systematic integration of GHRM practices into the environmental and organizational policies of oil-sector enterprises, with particular emphasis on technological advancement and the active involvement of employees in sustainability initiatives............... Keywords: ...............Green Human Resource Management, Sustainable Development, National Oil Corporation.