Joint Effects Model (JEM) Increment 2 Development. Aeris is a key member of the General Dynamic’s Information Technology (GDIT) led team currently developing the Joint Effect Model (JEM) Increment 2 (JEM 2.0) for the Space and Naval Warfare Systems Command (SPAWAR). JEM is a Web-based software application that supplies the Department of Defense (DoD) with a single accredited tool to effectively model and simulate the effects of chemical, biological, radiological and nuclear (CBRN) weapon strikes and incidents. JEM can provide warfighters with the ability to accurately model and predict the time-phased impact of CBRN and Toxic Industrial Chemical/Material (TIC/TIM) events and effects. The system architecture is based on a service-oriented architecture (SOA) that uses the CBRN Science and Technology (S&T) Community of Interest’s (COI’S) defined designed patterns named CCMI (Common CBRN Model Interface). The CCMI standards helps organize COI’s scientific models into components that intercommunicate via well-defined Java/xml interfaces. As part of this effort, Aeris is providing software engineering and subject matter expert (SME) support with a specific emphasis on developing, testing, and validating the Atmospheric Transport & Dispersion (AT&D), Meteorological Processing, Secondary Evaporation, and Source Term Estimation (STE) system components.