Your committee will consist of your thesis director and second reader. If you are also completing departmental honors, some departments will require a third reader, contact your departmental honors director for more details.
Your thesis director must be a tenured or tenure-track professor. Lecturers and adjunct instructors are generally not eligible to serve as thesis directors; if you feel your circumstance is exceptional, contact the Dean to ask for an exception.
Your second reader must provide expertise from outside your director's department. They can be a professor or instructor at App State from a different department or an expert from the wider community. They cannot be a close family member.
You should meet regularly with your thesis director (on average once a week) and have a plan to keep your second reader regularly informed and engaged in your work.
The linked tips for connecting with a thesis mentor may be helpful as you begin to build your committee.