Ok, this is my second post today, I wanted to ask what happens when you complete all the specialisations, can you switch from one to another? , every specialisation has its own perks, e.g. tracker has ordnance requisition, but can you switch just to get a certain perk, or are you stuck with the last one you finish?
The last spec you choose is the one your stuck with under your name. When you complete a spec you unlock a perk for your loadout. those can be changed at any time.
thanks , helped a lot 
You will have the option of each specialization in your loadouts.