Robert B. Willumstad , who was Citigroup 's chief operating officer , left in September and is now a director at the American International Group .
Robert B. Willumstad
Citigroup
/business/person/company
Robert B. Willumstad
American International Group
/business/person/company
PERSON
Robert B. Willumstad
ORGANIZATION
Citigroup
ORGANIZATION
American International Group