Senior Systems Engineer

Description The Contested Autonomy & Navigation Branch at Leidos provides cutting-edge navigation for customers who can't rely on GPS alone, and we need your help in the Rocket City (Huntsville, AL)! This position offers both analytic and hands-on tasks, including development, simulation, analysis, and field testing of navigation algorithms. We perform research, development, and advanced prototyping for DARPA, NASA, Air Force Research Laboratory, Office of Naval Research, and Army Combat Capabilities Development Command engineering centers. These customers need to get our advanced technologies into the field! You'll work with other engineers in small teams using spiral or agile development to meet aggressive schedules aimed at live demonstrations and transition to fielded systems. Are you excited about making advanced technologies work in the real world? Then we want you on our team! For more information about the work we do, please visit: products/assured-positioning-navigation-and-timing Primary Responsibilities: Perform modeling, simulation, and analysis of a navigation system as part of a broader system simulation. Conduct simulation trade studies to inform selection of navigation hardware meeting system requirements. For developmental flight systems, lead the design of new algorithms and transition existing Leidos algorithms to produce software enabling accurate, real-time GPS-denied navigation. Use and apply multiple sensor fusion algorithms, including extended Kalman filters, unscented Kalman filters, particle filters, and factor graphs. Fuse simulated and real-world sensor inputs from inertial sensors, GPS, altimeters, cameras, altimeters, and other aiding sensors. Work within a team of engineers across disciplines to design innovative navigation systems that are often constrained by conflicting factors, including accuracy, operating environment, and cost. Travel individually and with a team to coordinate with teammates and customers across a large program; travel will typically last no more than a week at a time. Present techniques, solutions, and results to the team and to customers. Basic Qualifications: Bachelor's degree in advanced technical field (electrical engineering, software engineering, aerospace engineering, mechanical engineering, or equivalent) and 8+ years of prior relevant experience or Master's degree with 6+ years of prior relevant experience. 3+ years of relevant experience with one or more sensor fusion algorithms: extended Kalman filters, unscented Kalman filters, particle filters, or factor graphs. Experience working with Inertial Measurement Units (IMUs) in the context of a multi-sensor navigation system. Good working knowledge of navigation architectures as part of a flight system involving closed-loop Guidance, Navigation, and Control software. Demonstrated ability to contribute to dynamic simulations in MATLAB or similar environment. Demonstrated interpersonal skills, including ability to work within an Integrated Product Team (IPT) and externally with other subsystem teams. Ability to clearly articulate technical information, often to non-technical customers. Must be a US Citizen with existing security clearance (Secret or above). Preferred Qualifications: PhD Degree in one of the majors listed above. Familiarity with alternative navigation technologies to improve navigation performance in GPS-degraded environments. Experience deploying navigation algorithms to real-time applications. Experience with Linux, C++, and/or Python. Experience with version control tools, especially Git or Subversion. Experience conducting business in high OPSEC environment, including modeling, simulation, and software development. Experience with specifying, testing and/or qualifying sensor hardware. Working knowledge of computer vision techniques. Eligibility for upgrade to Top Secret clearance. NKE If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares. Original Posting: August 28, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range: Pay Range $107,900.00 - $195,050.00 The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. About Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit Pay and Benefits Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at Securing Your Data Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at . If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission. Commitment to Non-Discrimination All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws. #Remote