Washington (CNN) Department of Homeland Security acting Secretary Chad Wolf has installed a new leader at US Citizenship and Immigration Services, a move that appears to signal the latest efforts by the White House to shake up the department leadership.

The appointment of Joseph Edlow come at the request of the White House and Wolf, who oversees the agency, a source familiar with the change told CNN.

Edlow, who is USCIS chief counsel, is moving into a deputy director role and will serve as the day-to-day leader of the agency effective Wednesday, according to an internal agency notice.

The move pushes out the current deputy director Mark Koumans, a career official, who has been running daily operations.

The shift comes three months into Wolf's tenure and amid additional leadership changes to move allies into key positions. The agency, which manages the federal government's legal immigration system, has been at the forefront of some of the administration's most aggressive and controversial immigration policy changes, most notably the public charge rule, which seeks to limit access to green cards for immigrants that receive certain government benefits.

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