This contract requires worldwide door-to-door express package delivery services for the U.S. Federal Government, with separate segments for international shipments up to 300 lbs and domestic shipments up to 150 lbs in the continental U.S. The period of performance is a four-year base period from October 1, 2022, to September 30, 2026, followed by one four-year option and an additional six-month extension option. The government intends to award multiple indefinite-delivery contracts for international services and approximately up to five for domestic services. A key requirement is that the prime contractor must participate in and maintain status in the Civil Reserve Air Fleet program at the time of proposal submission. Performance of services is required worldwide.