Boeing Defense, Space & Security (BDS) is seeking a Senior Systems Engineer (Level 5) to support the Systems Engineering Integration & Test (SEIT) team in Hazelwood, MO. This position will be responsible for helping drive the program systems engineering effort and be a key leader on the team tasked with owning overall system definition and functional design. Key aspects of this work include leading functional/behavioral decompositions, requirements, interfaces, CONOPS, and system parametrics, and then working across the program engineering teams to link them all together in the MBSE tool suite.