How I grew Diamond Trust Bank Uganda by 40 times in 17 years⏤ Varghese Thambi’s Untold Story As a senior banking Executive in India's thriving financial services industry, it had never crossed Varghese Thambi's mind that he would ever work in Africa and Uganda in particular. But 17 years after taking a leap of faith, albeit amidst mixed feelings from his household, he is glad that he did. He has fallen so much in love with the country that after serving for 17 years as Managing Director and CEO of Diamond Trust Bank (DTB) Uganda, he has decided that he will stay in Uganda, commonly known as the Pearl of Africa.