News of the potential tie-up comes as SES has announced its first half results.
Former DRS executive David Fields will succeed Pete Hoene as president and CEO of SES Government Solutions.
The satellites will provide an initial warning of a ballistic or tactical missile launch anywhere on the globe.
This agreement is part of a broader strategy by Thales to engage with startup space companies.
There will be 15 directors on the combined board, including ten independent directors.
Following Airbus Defence and Space's handover, Measat-3d has entered commercial service.
Founders Vytenis Buzas and Linas Sargautis will continue to lead NanoAvionics as CEO and CCO respectively.
Kepler is working to build the Kepler Network connecting assets in space for data transfer.
In the context of rapid climate change, the Cristal mission operates on a global scale to better understand and monitor Earth's climate.