I am writing this VIA my phone so I am going to be very short. Remember you are writing this statement to a board of military officers so there is no need to speak to them as though they don't know what a CDI, PC, or WC Sup does. They also know the difference between a E-1 and E-5. Stuff they may not know is how many people did you supervise. How many people did you train. So basically by adding all the extra unnecessary information you do yourself a disservice. Short and sweet is the best way to attack this statement. It will take me sometime but I will give you a proper critique as soon as I have time.
BTW... There is a part or two in your statement that reminds me of my own... Which may be a good thing or a bad thing...