What is the title given to an individual who manages a government department and is a part of the cabinet in the United States?

The title given to an individual who manages a government department and is a part of the cabinet in the United States is "Secretary." In the U.S. government, each major department has a Secretary who serves as the head and is often referred to simply as "the Secretary." For instance, there is the Secretary of State, Secretary of Defense, and Secretary of Education, among others. These individuals are appointed by the President and confirmed by the Senate, and they are responsible for implementing and overseeing the federal policies and regulations within their respective departments.

The term "Minister" is commonly used in parliamentary systems, like those in Canada or the United Kingdom, where it often refers to a member of the government responsible for a specific area, like healthcare or education. "Commissioner" typically refers to a person overseeing a specific agency or program, often at a state or local level. "Undersecretary" usually denotes a position subordinate to a Secretary and is responsible for specific areas within a department but does not have the same level of authority or cabinet membership.