If I may, in France, one does not need to be part of the military...At least to be an f/o for the Sécurité Civile (which is part of the State Ministry, not Defense)...
There's a recruitment process, asking for 500hrs tt, JAR, and a few tests/interviews (including psy and pilots)...
Otherwise, regarding the Captains, most of them come from the Air Force/Navy, but at least 2 of them come from a civilian training...