Of course. In fact, it really depends on the reason for suspension. Why have you been suspended? I might can help you
Yes, I've gotten 2 accounts unbanned and they are currently in good standing. I was working for a gold investment company that hired a cheap indian outsourcing company for PPC. The whole thing went downhill after they started backlinking tons of horrible spam websites. Luckily the owner of the gold company was good friends with a google insider who helped him get everything fixed up in a matter of weeks. It's crazy how connections can be so effective.