Industrial companies are to an increasing extent faced with requirements for better sustainability performance. Green market expands and green purchasing is regarded as a contribution to sustainable development. This paper examines impacts of implementing environmental management systems on enterprises’ competitiveness in international supply chains at the example of Estonian shipbuilding
enterprises. The theoretical concept of supplier selection process is used. The alignment problems of green procurement requirements and conditions are considered. The paper focuses on the relationships in the chain affecting the procurement and selection processes. The ship's chain and life cycle of the product specifics are also provided.