Landlord/tenant actions are not generally handled on a contingency basis, particularly when representing landlords.
But if you do want to find one, the "Find a Lawyer" feature is where you'd want to start.
This answer does not constitute legal advice and does not establish an attorney-client relationship.
Some states have laws in place that prohibit attorneys from working on contingency in certain type of cases. Caution.
Use Find a Lawyer tab above.