When you find yourself in vocational rehabilitation, a vocational expert is the right person to look for. He will stand by your side in court and claim for Social Security benefits on your behalf when you are not in a position to continue work because of an incident or illness. His job is to estimate what you would have earned before and after the incident. You must convince the Social Security Administration that you will not be able to work for you to be given the benefits. A diagnosis might not be enough to do so but a New York vocational expert may be.