Ratan Tata has been the chairman of Tata Group since 1991 and will be retiring in 2012. During his tenure, he has transformed Tata from an India-centric company to a global business through major acquisitions such as Tetley, Jaguar Land Rover, and Corus. Some of his acquisitions faced criticism for overpaying but helped make Tata the fifth largest steel producer. He started his career at Tata Steel working on the shop floor and was later appointed chairman of Tata Industries in 1981.