Colleges and universities comprise many departments, each with its own area of focus. Department chairs hold a leadership role over their department, working to implement the university's vision by shaping the department's curriculum and goals. They supervise professors, instructors, and assistants, as well as communicate and collaborate with university administration to promote the university's goals and maximize their department's work. The department chair also manages the department's finances, working with instructors to acquire necessarily materials within a reasonable budget. They also play a role in hiring for their department, as well as serve on university committees as needed.