PurposeThis study investigates the effect of green human resource management (GHRM) on green corporate citizenship (GCC), green corporate reputation (GCR), environmental performance (EP) and business performance (BP). The study further examines the mediation roles of GCC, GCR and EP between the direct paths.Design/methodology/approachData for the study is solicited from 185 managers from Ghanaian oil and gas companies. Partial least squares-structural equation modeling (PLS-SEM) is applied to test all hypotheses.FindingsThe results suggest that GHRM has a significant positive effect on GCC, green reputation, environmental and BPs. The mediation analysis further shows that, unlike EP which plays no mediation role, GCC and green reputation play complementary partial mediation role between GHRM and BP. Moreover, GCC mediates the relationship between GHRM and EP.Originality/valueAside from magnifying environmental management and the GHRM literature, this study is among the few that investigates the connection role between GHRM, GCC, green reputation, environmental and BPs, especially from direct effects and mediation analysis standpoint.