The name of a legal or commercial entity is not exempt from the convention of subject-verb agreement unless it is subsumed under another descriptor.
For instance, the following would be grammatically OK:
If you are looking for an XYZ Residential Real Estate Attorney, the entity known as the Law Offices of John Smith is here to help".
This is permissible because the singular noun entity is now the subject of the main clause, with "the Law Offices of John Smith" having in effect been placed in parentheses.
The result is not very elegant from a stylistic point of view, but that's a different issue.