Lead Systems Engineer to support government sponsors in architecting, analyzing, and integrating complex mission and enterprise systems. The role focuses on applying Model-Based Systems Engineering (MBSE), executable MBSE, architecture analysis, and digital engineering methods to develop system architectures and inform acquisition decisions. Responsibilities include modeling complex systems using standards-based frameworks (UAF, SysML, UML), developing executable models for verification and validation, designing prototypes and dashboards in Java and Python, applying industry standards (MOSA, OMS, UCI, FACE), and advising government sponsors on architecture strategies and digital transformation. The position requires 8+ years of systems/aerospace engineering experience (or equivalent with advanced degrees) and includes mentoring junior engineers.