Guidance Navigation & Control Engineer 3

Job#: 3047443
Job Description:
Guidance Navigation & Control Engineer 3
Location: Seal Beach, California (Onsite)
Candidates must be able to obtain and/or maintain a Department of Defense --Top Secret clearance as a condition and continuation of employment.
Role Overview
We are seeking a Guidance, Navigation, and Control (GN&C) Engineer to support the rapid prototyping, development, and fielding of novel space and hypersonic capabilities. In this role, you will contribute to first-of-kind solutions in a fast-paced, multidisciplinary environment. The position involves designing GN&C algorithms, building high-fidelity simulations, implementing and testing flight software, and supporting integration and flight tests for both atmospheric and space environments.
Key Responsibilities

• Design, implement, and verify guidance, navigation, and control algorithms for spacecraft, re-entry vehicles, and hypersonic/airborne platforms.
• 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 and communicate technical tradeoffs to stakeholders.
• Independently identify inefficiencies, propose solutions, and implement reusable tools and automations.

Required Qualifications
Education: A Bachelor of Science degree in Engineering, Engineering Technology, Computer Science, Data Science, Mathematics, Physics, Chemistry, or an equivalent non-US qualification is required.
Experience: A minimum of 5 years of related work experience is required. Alternatively, a Master's degree with 3 or more years of related work experience, or a PhD, is acceptable. Must have engineering experience with aircraft, missile, spacecraft, autonomous platforms, or similar vehicles.
Technical Skills: Proficiency with MATLAB, Simulink, and developing GN&C algorithms, models, and simulations is required. Experience with C/C++, Python, or C# is also necessary.
Preferred Qualifications

• A degree in Aerospace or Aeronautical Engineering (BS/MS/PhD).
• 10 or more years of 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.

Work Environment
This position is 100% onsite. Domestic travel may be required up to 5% of the time. This is a contract role with an initial duration of 12 months, with the possibility of extension. Relocation assistance is not provided.
Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.
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