The Digital Systems Engineering Department (DSED), part of SED, is charged with helping our customers successfully adopt, integrate, and utilize digital system models, methods, tools, and best practices as part of their systems realization lifecycle processes through DE and MBSE research & development, prototyping, studies, independent assessments, training, and advisory functions. Develop and analyze digital system engineering models of various types at different levels of fidelity using a range of modeling languages, methods, and tools to support programs that acquire, operate, and manage complex space, ground, launch, air defense, and nuclear security systems.