Big data is transforming the way societies address complex and systemic issues, offering the potential to revolutionize how social challenges are identified, understood, and tackled. From climate change to healthcare, education, and poverty alleviation, data-driven insights hold the promise of profound social impact. However, realizing this potential is not without its challenges. To fully harness the power of big data while safeguarding privacy, promoting equity, and ensuring long-term sustainability, robust leadership in data governance is essential. This article explores the intersection of big data, leadership in data governance, and sustainability. It examines the role of leaders in shaping ethical data practices, creating inclusive and equitable data governance frameworks, and ensuring that data solutions contribute to the social, environmental, and economic well-being of future generations.