President Obama has chosen a high-powered Washington lawyer with extensive government experience to be the State Department’s new special envoy for closing down the prison at the Guantanamo Bay Naval Base in Cuba.

Officials familiar with the decision said Clifford Sloan is the pick to reopen the State Department’s Office of Guantanamo Closure. The office was closed in January.

The officials were not authorized to discuss the appointment publicly before a formal announcement is made Monday.

The move fulfills part of Obama’s pledge to renew efforts to close down the prison.

Sloan has held senior positions in Democratic and Republican administrations and is a partner in the D.C. law firm Skadden, Arps, Slate, Meagher & Flom.