A £250m contract with the RAF will help sustain 200 jobs at a facility in North Wales.
Defence contractor Raytheon has been awarded the contract to support the RAF's intelligence gathering Shadow aircraft fleet.
The contract will support 450 jobs across the UK, including 200 at their facility in Broughton, North Wales.
The support contract will provide maintenance, airworthiness, design and supplier management services for the aircraft.
Shadow, which has been flown on operations in Iraq and Afghanistan, performs intelligence-gathering operations all over the world.
Announcing the new deal, Defence Minister Stuart Andrew said the move will confirm North Wales as a centre of excellence for air support.