This study aims to propose and to validate a research model on project sustainability management. Moreover, it investigates the relation between project sustainability management and project success. The methodological approach is a survey-based research, using structural equation modelling to validate the research model. The hypotheses were tested based on a field study involving 222 projects distributed among eight industries and two countries. The results show a low degree of commitment to social and environment aspects of the surveyed projects. The structural model proposed shows a significant and positive relation between project sustainability management and project success and in reducing the social and environmental negative impact.