This study investigates the impact of Environmental, Social, and Governance (ESG) practices on managerial performance within the oil and gas industry, focusing on the Oil and Natural Gas Corporation (ONGC) and Indian Oil Corporation Limited (IOCL). The research explores the relationship between ESG adoption and key performance metrics, including Return on Assets (ROA), Total Income, Cost to Income Ratio, and Market Capitalization. Financial data from ONGC and IOCL for the period 2011 to 2024 were analysed using t-tests within a robust analytical framework. The study provides empirical evidence on how ESG practices influence managerial performance in the industry. Findings indicate that ESG adoption has significantly enhanced key performance indicators. Both ONGC and IOCL have experienced improved managerial outcomes with the implementation of ESG principles. These results highlight the potential of integrating ESG into corporate strategy to boost operational efficiency and overall organizational performance. The study offers valuable insights into the practical benefits of ESG adoption in the oil and gas sector and provides a quantitative foundation for future research and industry applications, promoting a more responsible and sustainable approach in this vital industry.