Principal Software 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 Aeronautics Systems is looking to add a Principal Software Engineer to join our team on site in San Diego, CA, or Oklahoma City, OK. The candidate should be a self-starter with familiarity working in an Integrated Product Team construct. This position will be part of the Models & Simulation team, participate in planning, integration, and delivery of software releases, and troubleshooting technical issues. Roles and Responsibilities will include: •Develop, implement, and maintain modular simulation and modeling software (e.g., C++, Python) to support system behaviors and scenarios. •Integrate simulation components with system interfaces, middle-ware, and test harnesses; ensure interoperable data flows and real-time performance. •Design and execute verification and validation tests, analyze results, identify defects, and implement fixes to ensure model fidelity and accuracy. •Optimize simulation performance and scalability; profile code, reduce latency, and support CI/CD pipelines for automated builds and deployments. •Collaborate with systems engineers, testers, and stakeholders to translate requirements into simulation scenarios, produce technical documentation, and support demonstrations. The selected candidate will be required to work full-time, on-site at our facility.  There is no remote / hybrid / telework available for this position.  Travel up to 10% may be required. Basic Qualifications: •Bachelor’s Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline and 5 years of related engineering experience; OR a Master’s degree in a STEM discipline and 3 years of related engineering experience; OR a PhD in a STEM discipline and 1 year of related engineering experience. •Demonstrated professional experience developing software and scripts in C/C++ AND Python •Demonstrated professional experience with software change control, and change management such as: Atlassian tool suite, GitHub, AND/OR GitLab •Demonstrated Professional Experience with the full Software Development Life Cycle (SDLC) •Demonstrated professional experience with static code analysis tools such as: Coverity, SonarQube, AND/OR Fortify •Active U.S. Government Top Secret clearance (with a background investigation within the past 5 years or enrolled into Continuous Evaluation). •Ability to obtain and maintain initial Special Access Program (SAP) access via a Program Access Request (PAR).  This SAP/PAR must be obtained prior to commencement of employment and must be obtained within a reasonable amount of time as determined by the company to meet its business needs. •Ability to obtain and maintain subsequent SAP PARs following commencement of employment to be able to completely support statement of work. Preferred Qualifications: •Current applicable Special Access Program (SAP) clearance. •Differentiating characteristics include demonstrated leadership, teamwork capabilities, excellent oral and written communications skills, and strong