Zachary Piper Solutions is seeking a Guidance, Navigation and Control (GNC) Engineer to support the development and prototyping of a hypersonic next generation fully autonomous reusable spaceplane in Seal Beach, CA. The GNC Engineer will Design, implement, and verify guidance, navigation, and control algorithms for spacecraft, re-entry vehicles, and hypersonic/airborne platforms. This position is onsite in Seal Beach, CA and requires an active TS/SCI Clearance. Responsibilities of the GNC Engineer: • Develop and maintain 6 DOF dynamics simulations and associated analysis tools for mission and performance assessment. • Implement and validate GN&C flight software (MATLAB/Simulink models and C/C++ prototypes) and integrate with testbeds and avionics. • Apply astrodynamics and flight mechanics to mission design, novel orbit concepts, and trajectory optimization. • Apply aerodynamics, atmospheric flight mechanics, and controls knowledge to support the design of re-entry guidance, navigation, and flight control functions. • Develop powered and unpowered guidance laws and autonomy tools for on orbit and atmospheric operations. • Support troubleshooting of operational anomalies, functional tests, and service incidents. • Produce concepts of operations, simulation artifacts, and test procedures to enable rapid iteration from prototype to flight test. • Collaborate with cross functional teams (systems engineering, avionics, test, and business development) and communicate technical tradeoffs to stakeholders. • Independently identify inefficiencies, propose solutions, and implement reusable tools and automations. Qualifications for GNC Engineer: • Bachelor of Science degree in Engineering, Engineering Technology (including Manufacturing Technology), Computer Science, Data Science, Mathematics, Physics, Chemistry or non-US equivalent qualifications directly related to the work statement 5+ years of related work experience (Ex. PhD, Master's + 3 or more years' related work experience) • Engineering experience with aircraft, missile, spacecraft, autonomous platform or similar vehicles • Proficiency with MATLAB and Simulink • Proficiency developing GN&C algorithms, models and simulations • Experience developing with C/C++, Python or C#. • Active Tier 5 (T5) Clearance, formerly known as Single Scope Background Investigation (SSBI) is Preferred Preferred Qualifications: • Degree in aerospace/aeronautical engineering (BS/MS/PhD) • 10+ years related technical experience or an equivalent combination of education and experience • Experience with spacecraft operations, space environment effects, or hypersonic re entry GN&C • Familiarity with state estimation and sensor fusion (e.g., Kalman filters), GPS/INS, or air data systems • Background in classical and modern control theory and nonlinear control design • Model based development experience and flight test support. • Prior work on space or hypersonic programs • Ability to work effectively in broad, minimally defined design spaces and to communicate technical results clearly. Compensation for the GNC Engineer includes: • Salary: $120,000-160,000+ depending on experience • Comprehensive Benefits Package including Medical, Dental, Vision, 401(k), PTO, Paid Holidays, and sick leave as required by law #LI-KD1 #LI-ONSITE Keywords: Aerospace, aviation, space, GNC, guidance, navigation, Matlab, Simulink, C, C++, aerodynamics, systems engineering, avionics, test, algorithms, simulations, models, Python, hypersonic, Kalman filters, GPS/INS, flight test, TS/SCI, California, Los Angeles,