Zachary Piper Solutions is seeking an experienced Guidance, Navigation, and Control (GN&C) Engineer to support the development of advanced aerospace and defense systems. This individual will contribute to the design, analysis, testing, and implementation of GN&C algorithms for next-generation space, hypersonic, and autonomous vehicle programs. The ideal candidate will possess a strong background in flight dynamics, control systems, modeling and simulation, and software development. This position offers the opportunity to work on cutting-edge technologies in a fast-paced, highly collaborative engineering environment. This is a fully onsite position in Seal Beach, CA. Candidates must hold an active TS/SCI security clearance. Responsibilities Include: • Design, implement, and validate guidance, navigation, and control algorithms for aerospace and defense platforms. • Develop and maintain high-fidelity six-degree-of-freedom (6-DOF) simulations and modeling environments. • Build and validate flight software utilizing MATLAB, Simulink, C/C++, and related development tools. • Apply astrodynamics and flight mechanics principles to mission planning, trajectory design, and performance analysis. • Support development of atmospheric flight control, re-entry guidance, navigation, and autonomy algorithms. • Develop powered and unpowered guidance laws for advanced vehicle applications. • Perform system analysis, troubleshooting, testing, and anomaly resolution. • Create technical documentation, simulation products, concepts of operations, and test procedures. • Collaborate with systems, software, avionics, integration, and test engineering teams. • Identify opportunities for automation, process improvement, and reusable engineering solutions. Required Qualifications • Bachelor's degree in Aerospace Engineering, Mechanical Engineering, Electrical Engineering, Computer Science, Physics, Mathematics, or a related STEM field. • 5+ years of experience supporting aerospace, spacecraft, missile, aircraft, autonomous systems, or similar vehicle programs. • Experience developing GN&C algorithms, simulations, and analysis tools. • Proficiency with MATLAB and Simulink. • Experience programming in C/C++, Python, and/or C#. • Strong understanding of control systems, flight dynamics, and system modeling. • Active TS/SCI security clearance. Preferred Qualifications • Master's degree or PhD in Aerospace Engineering or a related discipline. • 10+ years of relevant engineering experience. • Experience supporting spacecraft operations, orbital mechanics, re-entry systems, or hypersonic flight vehicles. • Familiarity with state estimation and sensor fusion techniques, including Kalman filtering. • Experience with GPS/INS navigation systems and flight instrumentation. • Knowledge of classical, modern, and nonlinear control theory. • Model-based development and verification experience. • Flight test support experience. • Experience working in rapid prototyping or advanced research and development environments. Desired Skills • Strong analytical and problem-solving abilities. • Excellent written and verbal communication skills. • Ability to work independently and within multidisciplinary teams. • Experience working in fast-paced environments with evolving requirements. • Demonstrated ability to communicate complex technical concepts to both technical and non-technical stakeholders. Salary and Benefits Include: • Salary Range: $120,000-160,000+ **depending on experience** • Full Benefits: Cigna Medical, Dental, Vision, 401K, PTO, Sick Leave if required by law, and Holidays Keywords: GN&C, Guidance Navigation & Control, Aerospace Engineering, Flight Dynamics, MATLAB, Simulink, C++, Python, Space Systems, Hypersonics, Control Systems, Astrodynamics, TS/SCI Clearance.