I wouldn't plan your career based on a civilian UAV career...there is no such thing yet.

Despite the fact that a lot of organizations would like to fill the NAS with UAV's there are some very significant hurdles, primarily the see-and-avoid" issue. This was highlighted again very recently overseas by near-collisions with airliners.

It would probably be prudent just become a pilot, then jump into UAV's when and if that makes sense.