Corporate social responsibility (CSR) &corporate governance's recent convergence towards sustainability have become major areas of attention for firms all over the world. Sustainability and corporate social responsibility demand effective company governance built on stakeholder participation, equity, transparency, and accountability. This article examines the CSR and corporate governance practices of ONGC, one of India's top Maharatna companies, in order to assess their sustainability. After examining company’s annual reports and sustainability reports from the financial years 2014-2015 through 2020-2021, a matrix was created to showcase the company's success in several sustainability-related aspects. The matrix and the assessment of ONGC's sustainability practices are supported by literature.