About BAE Systems Space & Mission Systems BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. This position is for an early-career system engineer who can work in, and grow to lead, a multi-disciplinary team to develop, maintain, verify and communicate the architecture and requirements baseline for a mission that includes Segment, Element (payload, spacecraft bus, and ground) and/or Subsystems.