Air Transport Services Group is an American aviation holding company which provides air cargo transportation and related services to domestic and foreign air carriers and other companies that outsource their air cargo lift requirements. ATSG, through its leasing and airline subsidiaries, is the world's largest owner and operator of converted Boeing 767 freighter aircraft. Through its principal subsidiaries, including three airlines with separate and distinct U.S. FAA Part 121 Air Carrier certificates, ATSG provides aircraft leasing, air cargo lift, passenger ACMI and charter services, aircraft maintenance services and airport ground services. ATSG's subsidiaries include ; ABX Air, Inc.; Air Transport International, Inc.; Omni Air International, LLC, ; Airborne Maintenance and Engineering Services, Inc., including its subsidiary, dba Pemco World Air Services; and . ATSG owns a 25 percent equity interest in West Atlantic. In March 2016, ATSG announced an agreement to operate an air cargo network to serve Amazon.com customers in the United States including: the leasing of 20 Boeing 767 freighter aircraft by ATSG subsidiary Cargo Aircraft Management; the operation of the aircraft by ATSG airline, Air Transport International; and gateway and logistics services provided by LGSTX Services. The 20 leases will be for five to seven years and operations agreements are for five years. ATSG will also grant Amazon warrants to soon buy 9.99% and up to 19.9% over a five-year period of ATSG common shares. In January 2017, ATSG announced it had acquired Tampa, Florida-based PEMCO World Air Services, a commercial aircraft maintenance, repair & overhaul provider and Boeing 737 passenger-to-freighter conversion house. In December, 2018 it was announced that additional agreements to lease and operated ten additional Boeing 767s for Amazon.com Services, Inc., to extend leases for twenty 767 aircraft ATSG provides to Amazon and extend the operating agreement through which ATSG's airline operate those aircraft in the Amazon Network. On October 2, 2018 ATSG announced that it had agreed to acquire Omni Air International LLC based in Tulsa, Oklahoma. Omni Air is a passenger ACMI and charter services provider with significant experience serving U.S. and allied foreign governments plus commercial customers. They are a leading provider of passenger airlift services to the U.S. Department of Defense via the Civil Reserve Air Fleet program, and a worldwide provider of full-service passenger charter and ACMI services. Omni Air also carries passengers worldwide for a variety of private sector customers and government services firms. Omni Air, founded in 1993, is an FAR Part 121 certificated and IATA Operational Safety Audit registered airline. On February 24, 2020, CEO Joe Hete announced his retirement effective on May 7, 2020 after 40 years of service to ATSG and its subsidiary companies. On May 7, 2020, Joe Hete was elected as Chairman of the Board for ATSG and Rich Corrado was elected CEO and President of ATSG. In June, 2020, Air Transport Services Group, Inc. has deployed a Boeing 767-300 converted freighter in June in support of the DHL Express network in Asia under the terms of a stand-alone ACMI agreement with DHL-Bahrain.