Pros
The compensation and benefits (high number of annual leaves) are higher than other companies in the same sector (aerospace industry) in France, especially looking at the Technical Department. If you want to learn more on the technical side (satellites operations and procurement) is the right place to be.
Cons
In the technical Department there is no possibility of a growing career path and changing inside the company is very difficult. You can acquire experiences, new responsibilities in your restricted field, but always remaining in the same position and with the same job title. No big incentives if you improve your productivity or if you want to do more. This aspect is more related to the cultural way of thinking and power of the Unions in France. In their opinion, small salary increments for every employee is better than giving increments following merit and productivity.