He was appointed CEO of CitiMortgage in 2008 , taking over Citi 's mortgage business during the U.S. economic downturn and housing crisis .
Earlier in his career , Das worked for American Express , Bank of America , First USA , and Morgan Stanley .
Das was appointed CEO of CitiMortgage in 2008 , taking over Citi 's mortgage business during the U.S. economic downturn and housing crisis .
Earlier in his career , Das worked for American Express , Bank of America , First USA , and Morgan Stanley .