You cannot reopen a case after 9 years to clear your name. Once you plead guilty and get sentenced, and once the time for appeal has expired, the conviction is final. After 9 years, it would be impossible for the prosecutor to put his case back together in order to try you. There is very little that you can do now.
Unfortunately, you only have four years from the date of the sentence to challenge the plea through a habeas corpus petition. Unless you weren't properly advised of this at the time of the plea on record, you dont have any way to challenge your conviction at this point.
You may want to spend some time drafting a really thoughtful letter that you send with job applications, etc, in order to explain how you've learned from the situation and are a better person now from the experience. There are also re-entry organizations that help with this very problem. It surely isn't an easy one.
No, but you can ask for a pardon someday if you can prove you are innocent. Having pled guilty, the burden shifts to you to show how you were innocent, and it is a real uphill battle.