Principal Deputy Solicitor General Jeffrey Wall, who recently urged an appellate court to order the dismissal of the federal prosecution of Michael Flynn, soon will step into the job of the government’s top lawyer before the U.S. Supreme Court.

With the Wednesday announced departure of U.S. Solicitor General Noel Francisco, Wall, 44, will become acting solicitor general until he or someone else is appointed and confirmed to the position. The Justice Department said the resignation of Francisco, a former Jones Day partner, is effective July 3.