The Army has developed a breadth of Modeling and Simulation (M&S) capabilities representing platforms such as fixed and rotary-winged aircraft, tracked and wheeled vehicles, and weapons systems for various uses and of various fidelities. The Army has represented humans – soldiers, civilians, and threats – in its M&S as well. These representations provide physical model characteristics for mobility, delivery accuracy, lethality, and sensing, as well as behavioral representation to support tactical movement, clearing a building, obtaining Human Intelligence (HUMINT), and treating simulated wounded. These models rarely represent the soldier as a complex system, representing factors such as stress, human physiology, leadership, unit cohesion, and morale, to name a few. Instead, the actions of the simulated soldier are often based on a deterministic model of human behavior. When nondeterministic representations are used, they are often stochastic where random numbers provide variability across iterations, but the variability comes from the random number seed, not from the model. This provides unsatisfactory simulation results for those stakeholders interested in analyzing the effects of the soldier representation, as the simulated soldiers appear robotic or even superhuman. This paper describes the Distributed Soldier Representation (DSR) research and development effort that has been underway at the Army Research Laboratory, Human Research and Engineering Directorate, Simulation and Training Technology Center (ARL HRED STTC) for the past two years. In this paper, we describe our research that has identified eleven areas of interest for improving soldier representation. We further describe the development of an innovative Service Oriented Architecture (SOA) that provides a modern web services-based approach to integrate disparate models to address these identified representation gaps. We describe the challenges and benefits achieved by taking a web-services approach, as well as the lessons learned from the web-services integration of the Effects of Stress with One Semi- Automated Forces (OneSAF). Finally, we discuss ongoing development work.