Recently, human activities have caused unprecedented environmental problems. Achieving sustainability is a challenging task globally that requires comprehensive managerial practices. In tackling this issue, a new type of management has emerged known as green management. This study explores the impact of green training on the environmental and financial performance of the Ministry of Education in the Sultanate of Oman through the mediating role of green employee performance. There is a scarcity of studies investigating green training in this context. Data was collected through a survey from all eleven educational Omani governorates, resulting in 225 responses. The findings of this study indicate that green training positively and significantly impacts the environmental and financial performance of the Ministry, as well as the significance of the mediation. In addition, to the theoretical contribution, policymakers can also benefit from the findings of this study to improve management practices and consequently contribute to overall sustainability efforts in the Sultanate of Oman.