HAGERSTOWN, Md.--(BUSINESS WIRE)--Merkle Response Management Group (Merkle RMG), a subsidiary of Merkle, a leading technology-enabled, data-driven performance marketing agency, has been selected by Catholic Charities USA (CCUSA) to manage its direct mail gift processing and donor service requirements. Merkle RMG provides a comprehensive solution that includes mail processing, scanning, imaging, data entry, exception services, and call center and email management. The three-year contract began i