The aim of this study is to identify the mediating effect of green orientation on the relationship between High Performance Work Practices and employee engagement. This empirical research gap was bridged in the Sri Lanka Navy context. Because of its island location, the country's most important defense force is in charge of Sri Lanka's maritime defense. Green orientation is a combination of green attitude and green behavior. High Performance Work Practices is a bundle of Human Resource Management which brings competitive advantages. Employee engagement is the employee’s cognitive, affective and behavioral involvement of his/her job as well as the organization. This is a quantitative study. Cross sectional study which was done in the non-contrived setting under the minimum, researcher interference. Unit of analysis is individual. Sample size is 150 and sampling technique is non-probability convenience sampling. In order to examine the mediation relationship between High Performance Work Practices (HPWPs), Green Orientation (GO), and Employee Engagement (EE), Partial Least Squares (PLS) modeling approach using SmartPLS 4.0 software was used. This two-stage analysis encompassed the Measurement Model and the Structural Model, enable to comprehensively explore the intricate interplay between the variables. The results illuminate that there is a mediating role of Green Orientation (GO) on the relationship between High Performance Work Practices (HPWPs) and employee engagement (EE). This positive mediation effect substantiates the notion that fostering a Green Orientation can increase employee engagement.
