Chip Somodevilla/Getty Images

Rep. Cedric Richmond (D-La.) is expected to announce on Tuesday morning that he is leaving his seat to serve as a senior adviser to President-elect Joe Biden, several people with knowledge of the matter told The Associated Press on Monday.

Richmond, 47, is a former chair of the Congressional Black Caucus and was a co-chair of the Biden campaign. He will take on a public engagement role, AP reports, working with the Black community and dealing with Congress.

Biden will have to hire hundreds of aides to serve in his White House, and will likely hire many people who previously served during the Obama administration. Last week, Biden announced his longtime confidant Ron Klain will serve as his White House chief of staff, and several people familiar with the matter on Monday said Biden picked his campaign manager, Jen O'Malley Dillon, as a deputy chief of staff.