The primary purpose of this study was to explore the relationship between environmentally specific transformational leadership, green human resource management, and employee green behaviour (EGB). In addition, the moderating role of environmental awareness was also examined in the relationship of all other variables. More so, in this study SmartPLS 2.0 program was applied for path and moderation effect analysis of surveys collected among 382 employees working across selected diverse industry sectors in the north-central and north-west geo-political zones of Nigeria. Results showed that both environmentally specific transformational leadership and green human resource management were significantly and positively related to EGB. Furthermore, results revealed that environmental awareness moderated the relationship between environmentally specific transformational leadership and EGB, as well as between green human resource management and EGB. Implications and suggestions for future research were discussed.