If you reset your P.E.C mode does that mean that you are able to pick if you want to be a mechanic, sepc op, med, etc...?

if you reset your P.E.C mode character, you still keep the credits you earned, head gear and camo you earned/purchased. make sure you SELL any equipment you have (grenades, armor, etc) before restting, that way you'll get half of the credits back. Also, depending on how many medals you have, you will reset to a level higher then level-5. So if you have 11 medals, you'll reset to level-15.