If your employer is not willing to help. I can not imagine what other way you can do?
But you need to try to convince them, they will not take any responsibity or experience any loss if you fail to get the application approved. Their signature just means they would like to keep you to work in that university.
Why not try EB1-a if you have perm back-up? More questions? use this email yjy_wang@yahoo.com
