The U.S. Justice Department has named Jennifer Kennedy Gellie, a career federal prosecutor with experience bringing espionage cases, as the new leader of a unit tasked with enforcing rules requiring the disclosure of lobbying and other political influence work for foreign powers, according to people familiar with the move.

Gellie succeeds Brandon Van Grack, who took over the unit in 2019 after serving on former Special Counsel Robert Mueller III’s team in the investigation of Russian interference in the 2016 presidential election. As a member of Mueller’s office, Van Grack played a prominent role in the prosecutions of former President Donald Trump national security adviser Michael Flynn and the former president’s onetime campaign chairman, Paul Manafort, who was convicted at trial on a slate of financial charges.