WILMINGTON, Ohio--(BUSINESS WIRE)--Air Transport Services Group, Inc., (Nasdaq: ATSG) today announced the retirement of James O'Grady, President of Air Transport International, Inc., an airline subsidiary of ATSG, and the appointment of his replacement, Mike Betson. O'Grady served as President of ATI since January 2016. Prior to that he had been Chief Operating Officer since September 2014. Before joining the airline, he held management positions in other ATSG subsidiaries, including serving as Managing Di ...