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Stratolaunch is a technology accelerator that engineers operationally realistic testing at Mach 5+. Our air-launched, Talon testbeds are reusable, cost-effective platforms that enable routine access to the hypersonic environment. We deliver flight data critical to validating system performance and achieving rapid technology deployment. Together with our customers, we drive innovations that are imperative to advancing national security. To help achieve these efforts, Stratolaunch is seeking a Sr, Staff, or Principal Level Guidance, Navigation, and Control (GNC) Engineer, with a focus in navigation, to participate in the development of hypersonic vehicle flight control systems.  You will contribute to the design, development, requirements verification, and test execution for hypersonic vehicle flight control systems.  This position will include evaluation of a broad range of technical data.   ESSENTIAL RESPONSIBILITIES Development and evaluation of advanced algorithms to satisfy navigation requirements Development of navigation models and simulations to predict navigation performance Perform analyses to verify algorithm designs meet requirements Contributions to aspects of the overall flight control system design, development, implementation, integration, and test Development of engineering tools, as needed, to complete the tasking Regular and comprehensive communication to the Vehicle Management System and GNC Leads Demonstrate honesty, responsibility, integrity, and fulfillment of commitments   QUALIFICATIONS & SKILLS To perform this job successfully, an individual must be able to perform each essential responsibility satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. Required Qualifications: Experience with navigation system design, development and testing on aerospace systems Experience in Kalman filtering, Extended Kalman filtering, and other estimation techniques Experience implementing tightly coupled GPS aided strapdown navigation solutions Experience building navigators to operate in contested environments and resilience approaches Experience with inertial measurements systems and common errors, drifts, and biases Experience developing and anchoring navigation simulation models to flight test data Familiarity with design robustness to address reset, initialization, dropout, and outlier rejection Familiarity with Anti-Jam approaches for modern GPS receivers such as CRPAs Familiarity with transfer alignment approaches for missile systems on military platforms Fundamental knowledge and understanding of flight dynamics and GPS technology Experience with software development processes and methodologies Ability to take initiative and prioritize tasking to fit within business goals Ability to quickly adapt to changing priorities Ability to obtain and maintain a security clearance   Required Computer Skills: Proficient with Matlab and Simulink Proficient with revision control tools (Git, Bitbucket) Proficient with MS Office Suite (Word, Excel, Outlook)   Preferred Qualifications: Experience implementing and troubleshooting closed loop GPS simulations in HIL environments Experience fusing multiple navigation aiding sources including non-GPS based data sources Experience with alternative aiding approaches for denied or degraded environments (e.g. TDOA) Experience implementing mitigations to electronic attack, and navigation signal spoofing in hardware and software for navigation systems Experience with cold start, warm start, and hot start for GPS systems Experience estimating wind relative angles utilizing synthetic air data and navigator states Experience with hypersonic or near-hypersonic missile or launch vehicl