Sr. Principal Systems Engineer

RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Top Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations to come. Our pioneering and inventive spirit has enabled us to be at the forefront of many technological advancements in our nation's history - from the first flight across the Atlantic Ocean, to stealth bombers, to landing on the moon. We look for people who have bold new ideas, courage and a pioneering spirit to join forces to invent the future, and have fun along the way. Our culture thrives on intellectual curiosity, cognitive diversity and bringing your whole self to work — and we have an insatiable drive to do what others think is impossible. Our employees are not only part of history, they're making history. Northrop Grumman is seeking a Sr. Principal Systems Engineer (Level 4) to support our training systems engineering development team with a strong emphasis on Model-Based Systems Engineering (MBSE). The selected candidate will own key elements of the training system architecture and requirements, leverage SysML and Cameo to develop and maintain system models, and help lead the team through major Systems Engineering Technical Review (SETR) events, including Training PDR TIMs, PDR, and CDR. This position is located in Melbourne, FL. This role will be responsible for developing and maturing training system specifications, requirements traceability, and design documentation, as well as coordinating with internal and supplier teams to deliver a robust technical baseline that meets customer needs. Responsibilities • Support Training PDR Technical Interchange Meetings (TIMs), including agenda preparation, government coordination/approval, and documentation of minutes, risks, issues, and actions • Plan, prepare, and execute Training SETR and associated review events, ensuring clear entry/exit criteria and closure of action items • Develop and mature the training system architecture and requirements to PDR-level maturity, including post-SFR gap assessment, functional decomposition, and allocated baseline definition • Integrate supplier subsystem specifications and models into the overall training system/weapon system architecture; validate logical decomposition, interfaces, and requirements traceability • Update and mature system/software design documents (SSDDs) and other element-level design artifacts to support Trainer SETR event and subsequent reviews • Support Trainer SETR events across VR, panel, hardware, and operational trainer devices, ensuring consistency with the technical baseline and customer expectations • Incorporate SETR event outcomes (RFAs and review comments) into updated requirements, architecture, and Cameo models; manage burn-down plans and coordinate submittal of updated baselines • Coordinate with supplier engineering teams to review and refine trainer subsystem specifications and models, provide clear technical feedback, adjudicate comments, and ensure supplier deliverables align with the system architecture, requirements, and program review milestones. Basic Qualifications • Bachelor’s degree in Systems Engineering, Electrical Engineering, Computer Engineering, Computer Science, or related STEM discipline with 9 years of experience OR at least 7 years with Master’s Degree OR at least 4 years with PhD • Significant professional experience in systems engineering across the development lifecycle (requirements analysis, architecture/design, integration, verification & validation) • Hands-on experience with Model-Based Systems Engineering (MBSE) practices, such as developing and maintaining SysML-based models, and using Cameo for system architecture, behavior, and interface modeling • Demonstrated experience preparing for and executing Systems