Policies for master’s committees vary from department to department. In some departments, a master’s committee may consist of just one faculty advisor; in other departments, the committee is required to have several members.
Please consult with the graduate handbook or other materials specific to your graduate program to learn more about the requirements for master’s committees.
Typically, the expectation for students completing a research thesis is that the chair of the committee is a regular, tenured or tenure-track faculty member, though non-tenure-track faculty members may be appointed as committee chairs if the department deems it appropriate.