The Senior Staff Systems Engineer – Mission Analyst is a recognized technical expert responsible for leading the design, analysis, modeling, and optimization of satellite missions and low Earth orbit (LEO) constellations across multiple programs. This role defines and influences mission architecture, constellation strategy, and long-term orbital operations concepts to ensure mission performance, resilience, scalability, and sustainability. This position operates as a technical authority within a multidisciplinary engineering environment, providing leadership in mission analysis, constellation design, orbital dynamics, and system-level trade studies. The Senior Staff Systems Engineer partners with engineering leadership, program stakeholders, and customers to shape requirements, evaluate architectural trades, and drive data-informed decisions from early concept development through deployment, operations, replenishment, and end-of-life planning.