James Gorman, who takes over as Morgan Stanley's chief executive on January 1, has picked finance chief Colm Kelleher and banker Paul Taubman to run the company's institutional securities unit, the New York bank announced on Tuesday.

Ruth Porat, global head of the financial institutions group, was named chief financial officer, succeeding Kelleher, the bank said.

Gorman announced the changes as he prepares to take the helm of the firm next month. Morgan Stanley swung to a profit in the third quarter, joining competitors like Goldman Sachs Group Inc and JPMorgan Chase & Co in the rebound that has swept the industry since last year's crisis.

Morgan Stanley also announced that Thomas Nides, the chief administrative officer, will also become chief operating officer, overseeing operations and technology.

Jim Rosenthal, head of firmwide technology and operations, was appointed as chief operating officer of Morgan Stanley Smith Barney and head of corporate strategy for Morgan Stanley.

In September, Morgan Stanley said Gorman, the bank's retail brokerage head, would replace John Mack as chief executive.

Mack, however, will remain chairman of the company.

(Reporting by Steve Eder in New York and Santosh Nadgir in Bangalore; Editing by Lincoln Feast, Maureen Bavdek, Dave Zimmerman)

Investment Morgan Stanley Jpmorgan chase