Organizations have faced pressure from their stakeholders to adopt environmentally friendly business practices since the last few decades, which creates a major problem in front of their management to sustain their position in the highly competitive market. In order to retain its strategic image among the stakeholders' minds, there is a need to develop some green practices in its human resources department that boost its sustainability. In this paper, there is a brief description regarding how these green HRM bundles caused a major impact on environmental sustainable performance. Its independent variables are; green hiring, green training & involvement, and green performance management & compensation. While organizational citizenship behavior acts as a mediator between independent and dependent variables. An online survey-based quantitative data collection method is used where 402 participants' data is considered to apply the SPSS test i.e. structural equation modelling. The majority of the participants' results show that green performance management & compensation cause a major influence on organizational citizenship behavior and environmental sustainable performance. While green hiring has, the least impact and green training & involvement show the moderate outcome on the dependent and mediating variable. This study is an informative approach for the Indonesian healthcare sector and its management to make some efficient changes in its HR policies, and also this data will add value in the decision making process of this state policymakers and other research fellows. Indeed, this is important research, but there are also some limitations like lack of mixed research, and Indonesia state-based restricted research can affect the acceptability of this analysis. This gap can fulfill by upcoming scholars in their research journals.