Senior Spacecraft Systems Engineer - TS/SCI Clearance

Space Systems Integration (SSI) in Chantilly, VA seeks a Spacecraft Systems Engineer with a strong software and interface background to support dynamic national security space programs. The role emphasizes software-intensive systems, interfaces, and system integration across the spacecraft lifecycle. You will collaborate with government and contractor teams, author ICDs and requirements artifacts, and lead interface coordination across multiple programs, with TS/SCI clearance required.