Citigroup's board of directors said Tuesday they have  appointed William R. Rhodes as vice chairman. 
Mr. Rhodes, who was already vice chairman of Citibank and Citicorp,  joins two others in that spot at the holding company level. 
  
Paul J. Collins, 62, a Citicorp vice chairman who is leading the merger  integration, is also a Citigroup vice chairman overseeing audit and   investment functions.   
Deryck C. Maughan, 51, the former head of Salomon Smith Barney, was  named vice chairman for strategy development in November during a   management shake-up that included the ouster of Citigroup's president,   James Dimon.     
  
Mr. Rhodes, 63, joined Citibank in 1957. His career at the bank has  largely focused on emerging markets, including stints from 1980 to 1984 as   senior corporate officer for Latin America and the Caribbean and from 1986   to 1990 as chairman of the bank's restructuring committee.     
Among his current duties, Mr. Rhodes appoints Citigroup's senior country  officers and is the company's senior officer on risk management and credit. 
He will continue to be vice chairman and senior international officer of  the Citibank unit, responsible for the corporate bank's client   relationships in emerging markets worldwide and relationships with   governments and other official institutions.