Who is not the head of the department in the cabinet?

In a cabinet, the head of a department is typically referred to as a minister or secretary, responsible for a specific area of government. Individuals who are not heads of departments may include advisors, aides, or other officials who support the cabinet but do not oversee a particular department. Additionally, the Prime Minister or President, while leading the cabinet, is not tied to a specific department and thus is not considered a head of any individual department.