Pros
It could be thrilling, awesome, and exciting to work for such a big group function. The countries and sites are extremely professional and dedicated, but...
Cons
... the Nanterre HQ, especially HR, is populated with either stooges or snakes, and the top management is micro-managing everything, as those guys don’t trust their people and believe everyone is either a thief, a child or a lazy person. Flee if you are the kind that takes initiatives, wants to be assessed on results rather than on tasks, and if you’re a non-French. You’ll get nothing but painful management, disappointment and frustration in the best case scenario. And also, forget about work/life balance and home office; those guys are probably hated by their family and think everyone should be the same.