Mukesh Ambani is the chairman and managing director of Reliance Industries Ltd, the largest private sector company in India. He has a net worth of $27 billion, making him the richest man in India and the 9th richest person in the world. Ambani believes in building businesses from scratch rather than acquiring existing companies. He has built Reliance into a global conglomerate with interests in energy, petrochemicals, communications and more. Some of Ambani's major achievements include constructing the world's largest oil refinery in India and serving on the boards of major international companies. Reliance Industries is now India's most valuable company and among the top private energy companies globally.