I have been awarded a judgment against someone . How can I collect?

Assuming that this person has no assets or income coming from Maryland, you will need to get the judgment "domesticated" in Pennsylvania.  Unless the original judgment was on default, this should not present a problem, although you may need to hire a Pennsylvania attorney.  Once that is done, you should be able to (a) get information from the debtor about his/her assets and income; (b) sell his/her assets to satisfy the judgment; and/or (c) garnish any monies coming to the debtor (wages, bank accounts, stock dividends, etc.) to satisfy the judgment.  Again, it will probably be much easier if you engage a Pennsylvania attorney to help, but, since you already have a judgment, you should be able to find an attorney who will handle the matter on a contingency, i.e. you would not have to advance fees (but may have to advance fees), and -his/her pay would be a percentage of what you recover.