The Indian Health Service (IHS) intends to award a sole source, firm-fixed-price purchase order to Duna Economic Group for specialized health economics analysis services. The work supports the IHS Service Area Adequacy and Referral Network Accessibility Study, focusing on translating geographic access data into budget-relevant decisions for American Indian and Alaska Native populations. The contractor must provide a PhD-level Senior Health Economist with demonstrated experience in Tribal health systems and federal health programs. The anticipated period of performance includes one 12-month base period and four option periods. Performance location is not specified.