Experience with one or more of the following subjects: geolocation, positioning, navigation, and timing (PNT) technologies and architectures, PNT resilience and interference analysis, mathematical modeling, space-related modeling and simulation, mission data processing, signal processing, space threats, resilient systems, algorithm design, or software development. The Surveillance and Navigation Architecture Performance Department (SNAPD) in the Integrated Performance Subdivision aspires to be the premier force advising the evolution of national security and civil space enterprises, leveraging our modeling and simulation (M&S) expertise to evaluate end-to-end architecture performance.