You can obtain a Writ of Execution and lien the employer's bank accounts and/or garnish his wages. Look at the settlement agreement, there may be a provision for attorney fees in the event enforcement is necessary. In that case, you might want to find an attorney wiling to take on the enforcement part of this matter. Good luck.
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Much depends on the status of your paper.
If you have a settlement agreement, but the action was dismissed as a result (i.e., there's no judgment), then all you can do is sue to enforce the agreement.
If you actually have a judgment, then all the tools available for enforcing a judgment (such as attaching a bank account) are available to you.
Without looking at your papers, there's no way to specifically advise you. I suggest you meet with an attorney for an hour to see what rights and remedies you have.