The rapid and accelerating depletion of natural resources has spurred governments and pressure groups to call for effective environmental management initiatives. One such initiative is the creation of a green organisational culture to combat environmental degradation. As a result, there has been a burgeoning of literature on the concept of green organisational culture; however, the research is still in its nascent stage. For this reason, this study investigated the mediating role of green employee behaviours on the relationship between green organisational culture and environmental performance in the mining industry. Data was systematically collected from 277 participants and analysed using SMARTPLS 4. The results revealed that, while green organisational culture significantly impacted environmental performance, green employee behaviours partially mediated this relationship. These results offer important insights for mine managers.