Systems Engineer - Mission Assurance (Mid-Career) - Millennium Space Systems Company: Millennium Space Systems Systems Engineer - Mission Assurance (Mid-Career) - Millennium Space Systems Millennium Space Systems (MSS), a part of Boeing Defense, Space and Security (BDS) is seeking a Systems Engineer - Mission Assurance (Mid-Career) to support our team in El Segundo, CA! Job Summary Millennium's Mission Assurance team is seeking skilled systems engineers looking to expand their skill set to en