Morgan Stanley named Jim Rosenthal chief operating officer to succeed Thomas Nides, who left to take a position at the State Department.

Rosenthal will lead the company's operations and technology groups as well as head its marketing, human resources and communications efforts, according to an internal memo from Chief Executive James Gorman obtained Tuesday by Bloomberg News. Mark Lake, a Morgan Stanley spokesman, confirmed the memo.

Nides was confirmed by the Senate last month as deputy secretary of state for management and resources. Rosenthal, who is Morgan Stanley's head of strategy and COO for its brokerage unit, will continue in those roles in addition to his new responsibilities.

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