Collaboration among Original Equipment Manufacturers (OEMs) and their product design and manufacturing engineering partners and suppliers is a key aspect of any major aerospace and defense (A&D) program execution. Process analysis by the A&D PLM Action Group (AD PAG) project team has shown that many different data formats, PLM software systems, and enabling infrastructure technologies exist across the OEMs and their supply base. Further analysis revealed that the greatest near-term value opportunity lies in addressing the inconsistencies and gaps in process and protocols for establishing and managing the ongoing operation of the OEM–supplier collaboration environment. This Collaboration Management System (CMS) Description document provides an overview of an open-service prototype application that embodies an A&D industry collaboration framework that was defined by the AD PAG Global Collaboration project team.