The Arlington, Va.-based defense contractor said Ryan will assume the chief executive role Monday.
“I am thrilled with the opportunity to join VT Group as its CEO, ” Ryan said.
An affiliate of New York-based private equity firm The Jordan Company acquired VT in May 2012 for an undisclosed amount.
Ryan has previously held the chief executive role at Androit Systems Inc. and has served as chairman and president of Mercury Federal Systems.
During his career in the public sector, he served as a senior executive in the Office of the Secretary of Defense and oversaw updates to airborne and space surveillance and reconnaissance systems.
He also served as an infantry commander and intelligence officer with the U.S. Marine Corps for 10 years.