You have to be DODMERB qualified in order to go to Field Training. I assume that you would not be selected, as your current DODMERB is only good for two years and will be expired by March. You will have to go through the DODMERB process all over again. It will be a very tight window for you. If you need a waiver, then you would most likely not be selected as there wouldn't be enough time to qualify you. When was your DODMERB exam date?
How do you know that you are DQed for only 2 years? Did you read it somewhere or did someone tell you that? Maybe they meant that the DQ would expire when the DODMERB expires. If that is the case, you may be DQed all over again with the new DODMERB. Did you try to get a waiver when you were DQed? What is the exact DQ code that you got from DODMERB? I can be more accurate if I know the whole story.