Yet with the mantle of chief executive soon to fall on his shoulders , the day has arrived for Mr. Dimon to live up to a reputation of Wall Street brilliance that was forged more than a decade ago at Citigroup , where he was Sanford I. Weill 's right-hand man .
Citigroup
Sanford I. Weill
/business/company/advisors
ORGANIZATION
Citigroup
PERSON
Sanford I. Weill