The White House Office is an entity within the Executive Office of the President of the United States (EOP). The White House Office is headed by the White House chief of staff, who is also the head of the Executive Office of the President. The staff work for and report directly to the president, including West Wing staff and the president's senior advisers. Almost all of the White House Office staff are political appointees of the president, do not require Senate confirmation and can be dismissed at the discretion of the president. Aside from Cabinet secretaries and Supreme Court justices, whose nominations require the approval of the Senate, the President of the United States has the authority to appoint people to high-level positions within the federal government unilaterally.