Senior GNC Engineer - Navigation Systems (Equity & PTO)

Next Matter; Torrance (CA); On-site; USD 140,000 - 200,000; Full time

Benefits offered by this job

Equity

Paid time off 4 weeks

Health benefits (100% employee-covered

Dental and vision

Parental leave

Fitness stipend ($100 monthly)

Onsite EV charging

Catered meals

Fully stocked kitchen

Job summary

Castelion seeks a Senior GNC Engineer to develop advanced navigation solutions for long-range hypersonic strike vehicles. You will shape state estimation across mission phases, including GPS-denied environments, and work with multidisciplinary teams to design, analyze, implement, and validate multi-sensor navigation algorithms in a fast-paced, hardware-driven setting.

You will integrate data from IMUs, star trackers, GNSS when available, and other sensors, and contribute to system-level

Qualifications

• Bachelor's, Master's, or PhD in aerospace, electrical engineering, or related field
• 5+ years of navigation algorithm development experience
• Strong background in EKF and multi-sensor fusion
• Experience with INS and external aiding sources (GNSS, star trackers)
• Proficiency with MATLAB/Simulink for modeling and testing
• Experience with real-time embedded systems
• Familiarity with alt-nav techniques for GPS-denied environments
• Ability to thrive in a fast-paced, hardware-driven environment

Responsibilities

• Design and develop navigation algorithms for high-speed flight vehicles, including inertial navigation and alt-nav methods
• Develop and implement multi-sensor fusion architectures using EKF and related estimation techniques
• Integrate data from IMUs, star trackers, GNSS (when available), and other onboard sensors for robust state estimation
• Collaborate with avionics, flight sciences, and flight software teams to integrate navigation algorithms into real-time embedded systems
• Conduct modeling, simulation, and analysis to evaluate navigation performance under GPS-denied conditions
• Support hardware-in-the-loop (HIL) testing, flight testing, and post-flight analysis
• Characterize sensor performance, biases, and error sources to inform filter design
• Develop tools/frameworks for navigation algorithm development, verification, and validation
• Mentor junior engineers and contribute to best practices in navigation and estimation
• Partner with program leadership to make technical trades aligned with mission success

Skills

Navigation algorithm development

Estimation theory

Multi-sensor fusion

Inertial navigation systems (INS)

Real-time embedded systems

Problem solving

Mentoring

Education

Bachelor's, Master's, or PhD in Aerospace/Electrical Eng

Tools

MATLAB/Simulink

Job description

Castelion seeks a Senior GNC Engineer to develop advanced navigation solutions for long-range hypersonic strike vehicles. You will shape state estimation across mission phases, including GPS-denied environments, and work with multidisciplinary teams to design, analyze, implement, and validate multi-sensor navigation algorithms in a fast-paced, hardware-driven setting.

You will integrate data from IMUs, star trackers, GNSS when available, and other sensors, and contribute to system-level