This study aims to determine and analyze the effect of green transformational leadership on green employee performance mediated by green work engagement in heavy equipment companies in Indonesia. The method used in this research is descriptive quantitative method. The population in this study is all employees who work in heavy equipment companies in Indonesia. With the structural equation modeling (SEM) analysis model, 110 samples were taken. The analysis technique in this study is Partial Least Square (PLS) using the Smart PLS 3.0 program to test the hypothesis. The results showed that there was a positive and significant effect of green transformational leadership on green work engagement and green employee performance. There is an effect of green work engagement on green employee performance. Green work engagement can mediate the effect between green transformational leadership and green employee performance in heavy equipment companies in Indonesia. Green work engagement is a very important thing to improve in order for the green employee performance to be able to improve through the implementation of green transformational leadership.