Two board groups within the human services industry include workers, who have direct contact with clients, and ___ who have little or no contact with clients

Back office staff who have little or no contact with clients

Explanation:

Front end or client facing staff deal with customers on daily basis. Where as your back office staff do not have interaction with clients generally and focus more on administrative roles and responsibilities and other internal requirements of the company. Thus the name "back office" staff.

the law, public safety, corrections, and security cluster prepares people for careers in planning, managing, and providing legal, public safety, protective services and homeland security, including professional and technical support services.

reducing the scale of the market for a new product.