The retired federal judge from New York will handle corporate investigations for the firm.
Mukasey left his post as the nation’s chief law enforcement officer last month after spending more than a year in Washington. Bipartisan groups of lawmakers praised him for helping to improve morale at a department that had been demoralized by hiring scandals under his predecessor, Alberto R. Gonzales.
As a federal judge, Mukasey developed expertise in terrorism, overseeing the trial of Omar Abdel Rahman, also known as the Blind Sheik.
Mukasey said that the looks forward to working with lawyers at Debevoise, where he expects to work on behalf of corporate boards and oversee companies that have run afoul of the law as an independent monitor.