Serco said this month it has promoted David Dacquino, appointing him chief executive of Serco's Americas division.
He succeeds Dan Allen, who announced earlier this year his intent to retire.
Dacquino, who joined the company in 2015, has led the defense group of Serco's Americas business. The company said he will take over Allen's responsibilities in the coming weeks.
He previously was CEO of SkyLink and CEO of the North America operations of VT Group. Dacquino also worked at Raytheon and Lockheed Martin.