One of the challenges facing the United States Air Force (USAF) and United States Navy (USN) is the need to respond effectively and efficiently to rapidly changing training requirements. The solution presented in this paper will leverage lessons learned on Broad Area Maritime Surveillance (BAMS) and Global Hawk (GH) ground segment Service Oriented Architecture (SOA) development efforts, to create a SOA based common products trainer. SOA focuses on "Services" as an abstract boundary, which facilitates interactions between those with needs for the service, to those with capabilities to use the service for training components. Leveraging the SOA it is possible to provide a "plug and play" common training system, which will link services or products between consumers and producers to provide a dynamic, real-time common training system. This paper will present challenges and current efforts within the USAF and Navy for common products, and recommend a solution as to how they can be integrated into a SOA. Within the USAF there are some products available to integrate into a SOA framework, such as a common visual database initiative for geospatial models. The Navy's common products include synthetic forces, common weapons simulations, and visual databases. The proposed approach will leverage common component interfaces to utilize industry and government "best of breed" COTS/GOTS solutions, as they are integrated into a SOA. One of the key enabling components necessary for the proposed SOA solution would be a requirement for the Operational Flight Program (OFP) to support a SOA framework for the training environment that is concurrent with standard aircraft OFP development effort. The BAMS and GH trainers have native Ground Segment OFP support, which will ensure concurrency and compatibility for the aircraft trainer. This paper will discuss and present a set of critical requirements of the SOA architecture that will ensure modularity and reusability of crew trainer simulations.