{"id":39725,"url":"https://alion.io/job/ngc-principalsr-principal-software-engineer-guidance-navigation-control-gnc","title":"Principal/Sr Principal Software Engineer Guidance Navigation Control (GNC)","company":{"id":12494,"name":"Northrop Grumman","domain":"northropgrumman.com","url":"https://alion.io/company/northropgrumman","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":83,"open_postings":389,"ghost_share":0,"stale_share":0.689,"repost_share":0.008,"time_to_fill_p50_days":26,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Hardware","role_family":"Hardware","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Beavercreek, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":103600,"max":155400,"currency":"USD","period":"year","gross":null,"usd_annual":155400},"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Git","optional":false},{"name":"Inertial Navigation","optional":false},{"name":"Jira","optional":false},{"name":"MATLAB","optional":false},{"name":"Python","optional":false},{"name":"Simulink","optional":false},{"name":"DO-178C","optional":true},{"name":"IBM DOORS","optional":true},{"name":"MIL-STD-1553","optional":true},{"name":"Sensor Fusion","optional":true}],"status":"live","first_seen_at":"2026-08-04T00:00:00Z","employer_posted_date":"2026-09-03","last_verified_at":"2026-10-24T19:30:12Z","board_verified":true,"closed_at":null,"days_open":83,"trust":{"level":"ok","repost_count":1,"flags":[],"days_open":82},"description":"RELOCATION ASSISTANCE: Relocation assistance may be availableCLEARANCE REQUIRED FOR START: NoCLEARANCE TYPE: SecretTRAVEL: Yes, 10% of the TimeDescription\nAt 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 Mission Systems is a trusted provider of mission-enabling solutions for global security. Our Engineering and Sciences (E&S) organization pushes the boundaries of innovation, redefines engineering capabilities, and drives advances in various sciences. Our team is chartered with providing the skills, innovative technologies to develop, design, produce and sustain optimized product lines across the sector while providing a decisive advantage to the warfighter. Come be a part of our mission!\nWe are looking for you to join our team as a Principal orSenior Principal Software Engineer - Guidance Navigation Control (GNC) based out of Beavercreek, OH. As a Software Engineer at Northrop Grumman Mission Systems you will have a challenging and rewarding opportunity to be a part of our Enterprise-wide digital transformation. Through the use of Model-based Engineering and Agile practices we continue to evolve how we deliver critical national defense products and capabilities for the warfighter. Our success is grounded in our ability to embrace change, move quickly and continuously drive innovation. The successful candidate will be collaborative, open, transparent, and team-oriented with a focus on team empowerment & shared responsibility, flexibility, continuous learning, and a culture of automation.\nWhat You’ll get to Do:\nIn this position you will be developing, testing, and debugging software for our cutting edge Navigation systems. As a member of our world class software development team, you will have opportunities to improve and expand your capabilities in software design and code development. You will also have opportunities to perform software and system integration on state of the art hardware, learn new software development techniques such as Model Based Engineering (MBE), and work in an agile and collaborative development environment.\nAs a successful candidate, you will collaborate with peers across our organization and will have clearly demonstrated the strong leadership skills needed to join our top performing team. You will have a track record as an effective communicator and problem solver who is able to develop and maintain good working relationships with our internal and external customers. You will also have demonstrated a commitment to ethics and integrity, and the capability to innovate while challenging our traditional ways of doing business. You will make us even better!\nThis requisition may be filled as a Principal Software Engineer or Senior Principal Software Engineer in Guidance Navigation Control (GNC)\nBasic Qualifications for Principal Software Engineer:\nBachelors degree in STEM discipline with 5 years of hands on Software Development experience; Masters in STEM discipline with 3 years of hands on Software Development experience; PhD in STEM discipline with 1 year of hands on Software Development experience\n\nExperience developing software in MATLAB/Simulink\n\nExperience with programming (C and Python)\n\nExperience using software management and workflow automation tools such as ClearCase, Git, ClearQuest, or Jira\n\nExperience with using MATLAB to create, process, analyze, and visually represent data\n\nExperience with using Simulink to model dynamic systems\n\nExperience using Model Based Engineering tools\n\nExperience with INS/GPS Kalman filter design and requirements definition\n\nDemonstrated ability to work in a collaborative development environment\n\nU.S. Citizenship is required\n\nAbility to obtain and maintain a U.S. Government Secret clearance is required\n\nRequired to work on site full-time at our Beavercreek, OH facility.\n\nBasic Qualifications for Senior Principal Software Engineer:\nBachelors degree in STEM discipline with 8 years of hands on Software Development experience; Masters in STEM discipline with 6 years of hands on Software Development experience; PhD in STEM discipline with 4 year of hands on Software Development experience\n\nExperience developing software in MATLAB/Simulink\n\nExperience with programming (C and Python)\n\nExperience using software management and workflow automation tools such as ClearCase, Git, ClearQuest, or Jira\n\nExperience using MATLAB to create, process, analyze, and visually represent data.\n\nExperience using Simulink to model dynamic systems.\n\nExperience with Navigation Systems and INS/GPS Kalman filter design and requirements definition\n\nDemonstrated ability to work in a collaborative development environment\n\nU.S. Citizenship is required\n\nAbility to obtain and maintain a U.S. Government Secret clearance is required\n\nRequired to work on site full-time at our Beavercreek, OH facility.\n\nPreferred Qualifications:\nCurrent/Active U.S. Government Secret clearance\n\nExperience in the development and performance of software tests\n\nExperience using DOORS for software requirements management\n\nExpertise in Sensor Fusion for Navigation Systems using IMU (Inertial Measurement Unit), GPS, barometers, and other sensors\n\nExpertise in algorithms such as Kalman Filtering\n\nExpertise in INS (Inertial Navigation System) mechanizations\n\nExpertise in Embedded INS/GPS (Global Positioning System) navigation systems.\n\nDemonstrated capability to translate formal software requirements into software designs\n\nDemonstrated capability to define software requirements for an INS/GPS system\n\nFamiliarity with/Experience in INS/GPS Kalman filter design and requirements definition\n\nExperience developing, verifying, certifying and releasing mission and safety-critical software systems that comply with RTCA DO-178B/ C or similar guidelines.\n\nDemonstrated use of MATLAB for simulation and INS/GPS system performance evaluation\n\nHands-on experience with one or more communication protocols such as MIL-STD-1553, ARINC-429 or RS-422\n\nExperience with code analysis tools such as Polyspace and software test tools such as LDRA and VectorCast\n\nPrimary Level Salary Range: $103,600.00 - $155,400.00Secondary Level Salary Range: $129,300.00 - $193,900.00The above salary range represents a general guideline; however, Northrop Grumman considers a number of factors when determining base salary offers such as the scope and responsibilities of the position and the candidate's experience, education, skills and current market conditions.Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay. Annual bonuses are designed to reward individual contributions as well as allow employees to share in company results. Employees in Vice President or Director positions may be eligible for Long Term Incentives. In addition, Northrop Grumman provides a variety of benefits including health insurance coverage, life and disability insurance, savings plan, Company paid holidays and paid time off (PTO) for vacation and/or personal business.The application period for the job is estimated to be 20 days from the job posting date. However, this timeline may be shortened or extended depending on business needs and the availability of qualified candidates.Northrop Grumman is an Equal Opportunity Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. For our complete EEO and pay transparency statement, please visit http://www.northropgrumman.com/EEO. 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