Federal Express Corporation was the U.S. Postal Service’s largest contractor in fiscal year 2013. The next largest USPS supplier was EnergyUnited, which provides consolidated telecommunication and energy billing services. Military air mail transportation provider Kalitta Air was third. Six of the Postal Service’s top 10 suppliers served the agency’s transportation needs. The Top 150 USPS supplier list is compiled annually by David P. Hendel, a partner in Husch Blackwell LLP’s Government Contracts practice group who focuses on Postal Service contracting matters.