Dr. Sitterle is a Principal Research Engineer at the Georgia Tech Research Institute (GTRI), where her technical work synthesizes systems science, complex systems, and defense analysis. She is an expert with over 20 years of experience in engineering science, integrating engineering, natural, and physical sciences leading to the design and analysis of systems. Her primary areas of focus are identifying driving influences in support of materiel development under uncertainty, and integrating defense operational needs with systems sciences across multiple domains to supports design and assessment of defense systems and operational and tactical concepts of employment in theater environments. Dr. Sitterle also serves as the Chief Scientist for the Systems Engineering Research Division within the Electronic Systems Laboratory in GTRI. In this role, she supports the definition and execution of R&D across the main pillars of model-based approaches, human systems, and digital transformation of systems engineering to provide new capabilities and advance stakeholders’ decision-making processes. She also serves as a current member of the Research Council for the Systems Engineering Research Center (SERC), a DoD UARC led by Stevens Institute of Technology.