U.S. President-elect Donald Trump on Thursday announced that Susie Wiles, one of his two campaign managers, will be his White House chief of staff, entrusting a top position to a political operative who helped the Republican win the election.

The appointment was the first of what is expected to be a flurry of staffing announcements as Trump girds for a return to the White House on Jan. 20.

As gatekeeper to the president, the chief of staff typically wields great influence. The person manages White House staff, organizes the president's time and schedule, and maintains contact with other government departments and lawmakers.