Marsal, a co-founder of turnaround advisory firm Alvarez & Marsal, will succeed Richard Fuld in the role, Harvey Miller, a lawyer representing Lehman, said at a hearing in the U.S. bankruptcy court in Manhattan on Thursday.

Miller said Lehman's board of directors has approved the change.

As part of a status update to the court, Miller said Lehman has recovered about $3.5 billion for the benefit of the company's creditors.

He also said the company has discovered it needs to analyze about 1 million intercompany derivatives transactions in addition to about 450,000 external derivatives transactions involving 8,000 counterparties.

He said the majority of the company's staff will be devoted to unwinding the derivatives trades.

Miller further said the company and its creditors committee is planning to present in January a mutually agreed upon motion to the court to appoint an examiner to probe activities surrounding Lehman's collapse.

(Reporting by Emily Chasan, editing by Gerald E. McCormick)