Expungement help. Seeking attorney

I have a non conviction criminal liability misdemeanor charge on my record from 2006. I also have a conviction simple assault charge on my record from 2007. Both of these cases involved childish criminal mischief. I would like to have them expunged. Under NH law, I've met the waiting period requirement, misdemeanor simple assault is not considered a violent offense (and therefore can be expunged), and I have not been convicted of multiple offenses (which would disqualify me from expunction). These offenses have made finding a respectable employer very difficult. I would like to have them expunged if possible.