Dhirubhai Ambani started his career as a clerk in Yemen and later became a manager at an oil filling station. He returned to India in 1958 and founded Reliance Commercial Corporation with Rs. 15,000. Through hard work and determination, he grew the company into the largest conglomerate in India with interests in petrochemicals, energy, retail, and telecommunications. Ambani passed away in 2002, but his vision helped establish Reliance Industries as one of the largest companies in the world.