Command and Control (C2) activities abound in the NAS, and significantly influence daily operations and overall NAS efficiency. Since C2 effects are so prominent, development of new operational concepts, and evaluation of proposed changes, requires simulation and modeling capabilities that include C2 effects. Metron Aviation leverages its extensive knowledge of the Command and Control (C2) functions of the National Airspace System (NAS) to develop models that enable realistic NAS simulations. The key innovations of this effort are 1) the implementation of models for NAS ATM C2 processes, and 2) the integration of these models with the NASA Langley Systems Analysis Branch's (SAB) Simulation Environment. The development leverages the following key capabilities: Metron Aviation's extensive experience supporting NAS C2 activities, and Langley's infrastructure for conducting NAS-wide simulations of air traffic. By developing this interaction we enable a system that allows researchers and analysts to evaluate current NAS operations and to investigate future technologies and concepts of operations. These users exploit the system's capabilities to observe NAS behavior and compare the benefits and impacts of operational concepts prior to pursuing implementation in the operational system.