One of the key aspects of the program is the cohort model in which the fellows move through the fellowship experience together. We work with our federal government partners on an annual basis to offer fellowships as a cohort that allows fellows to build a network of peers. We also occasionally have host offices who pilot the program in cities new to the CSPF program. While some locations may change from year to year, in general the host cities are determined based on the current participating partners in order to facilitate the cohort model.