You must find at least one faculty sponsor to support you and help you shape your IC. Your primary sponsor must be a full-time professor with a rank at or above senior lecturer (this includes Distinguished Senior Lecturers, Assistant, Associate, and Full Professors; research professors and emeriti professors are also eligible). Primary sponsors cannot be visiting or adjunct professors, lecturers, clinical professors, or professors of the practice; this is not because they aren't experts but rather because the regular faculty do not need to renew their teaching contracts annually. It can also be helpful to have multiple faculty sponsors if you are drawing heavily from two somewhat disparate fields and you find the sole expertise of one formal advisor doesn’t quite meet the needs of your IC.
To find a sponsor, we recommend checking out http://vivo.brown.edu to see what professors are doing research in the field(s) you are interested in and going to their office hours. Professors are often excited to talk to potential ICers because their work is innovative and unique! The Faculty Sponsor Info Sheet provides more information about the faculty sponsor role.