The objective of this paper is to assess the impact of green supply chain management on global collaboration capability and firm performance of Vietnamese enterprises. The study is performed on 890 enterprises in 8 economic sectors of Vietnam. After a period of 6 month of data collection, the analysis results show that green supply chain management had a positive impact on global collaboration capability. At the same time, green supply chain management had a positive impact on firm performance. Finally, global collaboration capability had a positive impact on firm performance. However, according to previous studies, the scale of enterprises size had a statistically significant moderate role in the relationship between green supply chain management and firm performance, but in the context of Vietnamese enterprises, the role moderate of size is not statistically significant.