what is the leader of each department called
United States federal executive departments The heads of the executive departments receive the title of Secretary of their respective department, except for the Attorney-General who is head of the Justice Department (and the Postmaster General who until 1971 was head of the Post Office Department). The heads of the executive departments are appointed by the President and take office after confirmation by the United States Senate, and serve at the pleasure of the President. The heads of departments are members of the Cabinet of the United States, an executive organ that normally acts as an advisory body to the President. In the Opinion Clause (Article II, section 2, clause 1) of the U.S. Constitution, heads of executive departments are referred to as "principal Officer in each of the executive Departments".
Cabinet (government) A cabinet is a body of high-ranking state officials, typically consisting of the top leaders of the executive branch. They are usually called ministers, but in some jurisdictions are sometimes called secretaries. The functions of a cabinet are varied: in some countries it is a collegiate decision-making body with collective responsibility, while in others it may function either as a purely advisory body or an assisting institution to a decision making head of state or head of government. Cabinets are typically the body responsible for the day-to-day management of the government and response to sudden events, whereas the legislative and judicial branches work in a measured pace, in sessions according to lengthy procedures.