[Marc]

At least in the Spanish Army, you don't need any previous experience to try to enlist to the Special Forces. Of course you must meet the requirements to begin the basic training and once you have finished it and in your unit, keep your morale high enough no to resign.

This would be true for all the "careers" listed in the recrutiment forms. Of course there are specific positions not listed in this forms that can olny be archieved through experience. For example, for the Spanish Parachute Brigade you could choose (in the recruitment form) among infantry, signals, enginners, logistics, etc. Once in the Brigade, if you had choosen infantry or signals and you were in the HQ battalion, with time and good references you could enter the PRP (an elite, patrol-sized unit that is our own version of the "Pathfinders"). Perhaps one term needed.