SIEDO is a joint venture of public and private sectors in the cities of Twin Falls, Jerome, Gooding, Minidoka County and Cassia County (Mini-Cassia area) which was formed to help diversify and strengthen the local economy by retaining and attracting businesses to the Southern Idaho region. SIEDO works closely with each of these communities to promote economic development through expansion of existing businesses and to implement a focused consistent program to attract new businesses to the region.