RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Northrop Grumman Defense Systems is seeking Principal / Sr. Principal GN&C Engineer to support activities including flight simulator development, GN&C algorithm development and implementation, and "test as you fly" with rigorous model and requirements verification and validation. This position will be in Roy, Utah supporting Flight Systems Futures. What you will get to do: The selected engineer will develop and mature guidance, navigation, and control (GN&C) algorithms, autopilots, and high-fidelity 6-DOF flight simulations for complex aerospace systems. This includes strap-down inertial navigation design, GPS integration, Kalman-filter–based navigation solutions, and the tuning of control laws using classical and modern techniques (PID, gain scheduling, optimal/robust control). The engineer will enhance existing GN&C and navigation analysis tools, perform covariance and CEP accuracy assessments, and contribute to emerging mission capabilities across advanced programs. The ideal candidate is a collaborative team player and strong independent contributor who demonstrates ownership of tasks, initiative, and sound technical judgment. They show advanced problem-solving skills and excellent written and verbal communication, coupled with strong interpersonal and organizational capabilities, a proactive mindset, and a meticulous, detail-oriented approach to their work. Primary responsibilities include, but are not limited to: - Collaborate with a team of GN&C engineers in an Agile environment to meet critical milestones - Develop, verify, and validate GN&C algorithms and 6-DOF flight simulations in a multi-disciplinary team environment - Design and implement strap-down inertial navigation systems integrated with GPS and Kalman filters - Perform trajectory assessment, flight analyses, covariance analysis, and CEP/accuracy evaluations - Apply trajectory optimization and nonlinear control techniques to improve missile trajectory performance. - Enhance and maintain GN&C and navigation analysis tools for new mission requirements - Participate in engineering review boards, technical interchange meetings, and critical milestone reviews - Model key subsystems such as IMUs, control actuators, and propulsion / thrust-vector control - Manage version control, continuous integration, and automated testing of GN&C software toolchains (Git, CI/CD). - Work with the GN&C Flight Software Team to automatically generate code from high-level specifications or models, ensuring consistency and reducing manual errors - Use C++ and MATLAB with object-oriented design principles to implement and analyze GN&C software - Collaborate closely with GN&C flight software teams to transition algorithms into flight-worthy implementations - This position is contingent on contract award. This position may be filled as a Principal (level 3) or Sr. Principal (level 4) Systems Engineer. Basic Qualifications: Principal GN&C Engineer: - Bachelor's degree in STEM and 5 years of experience, 3 years of experience with master’s degree, 0 years of experience with PhD. - Must have an active U.S. Government DoD Secret security clearance at time of application, current and within scope, with an investigation date within the last 6 years - Must have the ability to obtain Top Secret Clearance and Special Access Program (SAP) within a reasonable period as determined by the business needs of the company. - 1 year of experience in state estimation techniques: Kalman filters (KF, EKF, UKF), particle filters, and smoothing algorithms. ( t03: 1 yr | t04: 2 yr) - 1 year of experience with high fidelity vehicle modeling (6 DOF dynamics, aerodynamic heating, propulsion) and simulation environments (MATLAB/Simulink, Python, C/C++) ( t03: 1 yr | t04: 3 yr) - 1 year of experience with linear stability analysis to determine control system stability margins ( t03: 1 yr | t04: 3 yr) - 2 years of experience with MATLAB/Simulink for modeling, simulation, and code generation ( t03: 2 yr | t04: 4 yr) - 1 year of experience with Monte Carlo, robustness, and performance analysis tools ( t03: 1 yr | t04: 3 yr) - Participation in at least one flight test program (e.g., sounding rocket, missile, UAV) Sr. Principal GN&C Engineer: - Bachelor's degree in STEM and 8 years of experience, 6 years of experience with master’s degree, 4 years of experience with PhD. - Must have an active U.S. Government DoD Secret security clearance at time of application, current and within scope, with an investigation date within the last 6 years - Must have current Special Access Program (SAP) approval at time of hire. - 2 years of experience in state estimation techniques: Kalman filters (KF, EKF, UKF), particle filters, and smoothing algorithms. ( t03: 1 yr | t04: 2 yr) - 3 years of experience with high fidelity vehicle modeling (6 DOF dynamics, aerodynamic heating, propulsion) and simulation environments (MATLAB/Simulink, Python, C/C++) - 3 years of experience with linear stability analysis to determine control system stability margins - 4 years of experience with MATLAB/Simulink for modeling, simulation, and code generation - 3 years of experience with Monte Carlo, robustness, and performance analysis tools - Participation in at least one flight test program (e.g., sounding rocket, missile, UAV) Preferred Qualifications: - Ability to implement and optimize algorithms for real time execution on embedded processors (FPGA, DSP, multicore CPUs). - Experience in deploying algorithms to software, hardware, and testing. - Knowledge of Navigation and sensor fusion (INS, GPS, star tracker, lidar) - Knowledge of Real-time embedded systems and hard real-time constraints - Knowledge of test article instrumentation, telemetry, and fault diagnostics - Familiarity with hypersonic phenomena: shock wave interactions, real gas effects, ablative heating, plasma communication blackout - Ability to work in multidisciplinary teams (aero, structures, thermal, software) - Clear communication of technical concepts to non-specialists - Proven track record of troubleshooting complex real time systems - Python for data analysis & rapid prototyping - Use of version control (Git) and CI/CD pipelines - Familiarity with real-time operating systems - Experience with hardware in the loop (HIL) and software in the loop (SIL) testbeds - Experience evaluating impacts of control effectors on guidance and control (latency, bandwidth, etc.) - Experience evaluating impacts of navigation sensors on guidance and control (latency, frequency, etc.) - Experience integrating guidance law design with navigation and control to achieve stringent terminal accuracy and precision impact requirements in contested environments. - Knowledge of Advanced control theory (state space, optimal, robust, nonlinear, adaptive) - Knowledge of Flight dynamics of high Mach vehicles (aerodynamics, thermodynamics, propulsion integration) As a full-time employee of Northrop Grumman Space Systems, you are eligible for our robust benefits package including: - Medical, Dental & Vision coverage - 401k - Educational Assistance - Life Insurance - Employee Assistance Programs & Work/Life Solutions - Paid Time Off - Health & Wellness Resources - Employee Discounts This position's standard work schedule is 9/80. The 9/80 schedule allows employees who work a nine-hour day Monday through Thursday to take every other Friday off. Primary Level Salary Range: $98,400.00 - $147,600.00 Secondary Level Salary Range: $152,900.00 - $229,300.00 The 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.