DCNS has become the latest in a line of sub-contractors to snap up a supply mandate on BAE Systems' massive Type 26 warship programme.
Under current plans, BAE will manufacture 13 T26 warships for Britain's Royal Navy from 2016.
The ships are set to be launched in 2020 and will be functioning as part of the Navy until 2060.
BAE revealed that it has now signed six design development agreements with suppliers of everything from air weapons handling to fire-fighting systems.
DCNS will work on the vessel's propulsion shaftlines.
DCNS is a France-based naval defence company designs, builds and supports surface combatants, submarines, systems and equipment.
However, speaking to IBTimes TV in London, Mikael Kerhoas, sales manager at DCNS said it has a long standing relationship with BAE Systems and that is this contract is only one of many that it will be working on.