The objective of this dissertation is to propose a set of indicators and metrics for assessing the sustainability performance of Centers for Diffusion of Science, Education and Culture (CDSEC), whose applicability was demonstrated through a case study at the Fundação Planetário da Cidade do Rio de Janeiro (FPCRJ). These indicators and metrics, in turn, integrate a monitoring and evaluation (ME) model that combines the methodology of Balanced Scorecard (BSC) with the Sustainability Reporting Guidelines established by the Global Reporting Initiative (GRI). Within the context in which the research is situated, it is assumed that this effort will contribute to a broader understanding of sustainability assessment tools in CDSEC, emphasizing economic, social, and environmental sustainability issues. It is important to mention that until the present moment, the Global Reporting Initiative did not released a set of sectorial Sustainability Reporting Guidelines, especially addressed to CDSEC, as already occurs to other sectors. This opened a window of opportunity for academic research aiming at improving the GRI sectoral guidelines. This research can be considered applied and descriptive. The methodology encompasses literature review and documentary research; analysis of international experiences of CDSEC and selected normative references for assessing the sustainability of CDSEC; design of a monitoring and evaluation (ME) model for assessing sustainability performance of CDSEC; a case study carried out at the FPCRJ; discussion of the case study results; and formulation of conclusions and recommendations. The main result of this research is an innovative monitoring and evaluation (ME) model, especially designed for assessing the performance of CDSEC, from the perspective of corporate sustainability.