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".
Management Most organizations have three management levels: first-level, middle-level, and top-level managers. First-line managers are the lowest level of management and manage the work of nonmanagerial individuals who are directly involved with the production or creation of the organization's products. First-line managers are often called supervisors, but may also be called line managers, office managers, or even foremen. Middle managers include all levels of management between the first-line level and the top level of the organization. These managers manage the work of first-line managers and may have titles such as department head, project leader, plant manager, or division manager. Top managers are responsible for making organization-wide decisions and establishing the plans and goals that affect the entire organization. These individuals typically have titles such as executive vice president, president, managing director, chief operating officer, chief executive officer, or chairman of the board.