You need a commercial or civil litigation attorney. A civil litigation attorney or commercial litigation attorney would typically have the experience necessary to sue the person (litigate) in the necessary court, if settlement or other negotiations can't be worked out prior to filing the suit. Also a civil or commercial litigation attorney would be able to advise you if you have a valid claim to pursue.
If you do get a judgment against this person the attorney (commercial or civil litigation) should also be able to advise in the collection process.
Please seek advise by an attorney in your jurisidiction.
A collections lawyer can do it. A lawyer who does collections litigation can do it. I do not do collections work. but there are many in town who do. You can call the Virginia Lawyer Referral Service for a name.