Answer:
The correct word for the blank space is: Subject matter expert panel.
Step-by-step explanation:
A subject-matter expert panel is a structure that defines the profile, duties, and skills that an expert over a certain topic must fulfill. There could be cases in which the experts could specialize in a single area, while in others, those individuals could have general knowledge over different topics.
Therefore, using a subject-matter expert panel can be helpful at the moment of defining the responsibilities an ombudsperson has to cover within a firm.