The goal of the SFI external faculty is to provide the best research ecosystem for the trans-disciplinary and complexity science goals of SFI. All appointments to the SFI external faculty are by nomination only. Prior to appointment to external faculty one or more years of active involvement with the institute are required. Typically researchers that have not been to SFI are invited by a member of our faculty (resident or external) based on admiration of their work or through some form of ongoing collaboration.