Having read over 38 CFR and adding a lot of it to my brain-housing group, I know that I could assist you with your claim and point you in the right direction if you have any specific questions.
As far as your federal job, did you buy your time back for retirement purposes? If it's not too late, here is some info on that for you (and other members considering the federal route without their full pension retirement).
Welcome to JVHV!