I think after 6 years of domestic violence you need to think more about yourself and less about him.
You sound as through you feel sorry for the fact that he MAY get a criminal record (he wont), when he has subjected you to years of domestic violence.
There is no excuse for domestic violence, and he sounds as though he is a nasty bully, picking on a woman.
He may have a "good job" in public but he has been hitting you in private, and if it does affect his job and his future that is his fault, not yours.
(And I say all this as a man myself - he deserves all he gets)
p.s. If you have never complained to the police, or have proof of his violence (eye witnesses, photographs, doctor/hospital visits etc) you may have trouble proving domestic violence, even though you know it went on.
Good luck.