Operational stressors, such as fatigue, environmental conditions, and information overload, have the potential to significantly degrade Soldier cognitive function and, consequently, reduce the soldier's performance on a given mission. To better understand the impacts these stressors can have on performance, an improved analytical capability based upon existing Army research needs to be developed. To address this need, Technology Solutions Experts Inc. (TSE) proposes to construct the Cognitive Degradation Modeling Toolkit (CDMT), a suite of models and tools that will provide cognitive degradation representations as well as the capability to integrate these representations in Soldier system engineering tools, Soldier and Small Unit (SSU) constructive simulations, and human performance modeling and analysis tools. As the primary developer of the Infantry Warrior Simulation (IWARS), TSE has experience constructing high-fidelity models and integrating them into constructive simulations. Using this expertise, TSE will design, develop, and integrate the CDMT, providing an improved representation of the impact of cognitive stressors on operational performance.