National Vending is the U.S. Postal Service® Vending and Food Service Supplier. National Vending is also the USPS® information source for compliance with the State Licensing Agency and Blind Enterprise Program in accordance with The Randolph-Sheppard Act. Facility Services CMC⁄Facility Program Services CMT oversees National Vending food⁄cafeteria and vending services based on facility needs.