Purpose- Human developments in constructing buildings and their subsequent infrastructures despite certain advantages have unfortunately considerable effects on the environment, such that construction could be named as the main exploiter of the natural, physical and biologic resources. Hence, the purpose of this paper is to evaluate the effect of communication capabilities of the suppliers and external green integration on the green performance and financial performance of engineering and construction companies. Design/methodology/approach- The statistical population of the study comprises all 300 members of the Building Engineering System of South Khorasan Province. According to the Morgan table (1972), 167 participants were selected as the sample of the study using the stratified random sampling, and a standard questionnaire was distributed among them. Data were collected through library and filed methods. Data were analyzed using the factor analysis method (SPSS), and LISREL Software was used for evaluating the research hypotheses. Findings- The obtained results indicated that information sharing has a significant effect on environmental coordination and the green balance of green cost reduction of coordinate competitive advantage. Originality/value- Accordingly, given the results obtained from a developmental-practical research, the authors initially gathered and classified the required data on the construction industry using the library and field methods, then extracted the obstacles of the supply chain to help facilitate the implementation of efficiency in the so-called industry.

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