PHILADELPHIA — Hillary Clinton’s campaign announced on Tuesday that Ken Salazar, the former interior secretary and Colorado senator, would become chairman of Mrs. Clinton’s transition planning team.

The effort, which will be based out of Washington, is aimed at preparing Mrs. Clinton and her team to enter the White House after the November election if she wins — an operation intended to be largely separated from Mrs. Clinton’s campaign apparatus in Brooklyn.

The campaign said Mr. Salazar would lead four team members: Tom Donilon, who served as national security adviser under President Obama; Jennifer Granholm, the former governor of Michigan; Neera Tanden, the president of the Center for American Progress; and Maggie Williams, the director of Harvard’s Institute of Politics and a longtime Clinton confidante.

Two top campaign policy advisers for the Democratic nominee, Ed Meier and Ann O’Leary, will also shift full-time to the transition efforts. Heather Boushey, the executive director of the Washington Center for Equitable Growth, will be the team’s chief economist.