The Omidyar Fellowship at the Santa Fe Institute is unique among postdoctoral appointments. The fellowship offers transdisciplinary collaboration with leading researchers worldwide with up to three years residence in Santa Fe, New Mexico. The Institute has no formal programs or departments. Research is collaborative and spans the physical, natural, and social sciences. Most research is theoretical and/or computational in nature, although some research includes an empirical component. SFI averages 15 resident faculty, 95 external faculty, and 250 visitors per year. Applications are welcome from candidates from any country and any discipline.