Modeling & Simulation Engineer

Stealth Mode; Gardena (CA); On-site; USD 100,000 - 140,000; Full time

Job summary

Stealth Mode, located in Gardena, CA, is seeking a GNC Engineer specialized in simulations. The role involves developing high-fidelity simulations for missile flight and guidance validation, ensuring real-world dynamics and system performance are accurately replicated.

The ideal candidate should have a Bachelor's degree, 5+ years in simulations, and be proficient in Rust and Python. Additional skills in Monte Carlo testing and autonomous systems validation are preferred. U.S. citizenship is required due to ITAR compliance.

Qualifications

• 5+ years of experience building simulations or numerical modeling frameworks.
• Experience deploying or validating autonomous systems such as drones or satellites.

Responsibilities

• Design high-performance 6-DOF flight and physics simulations.
• Integrate GNC logic into full-stack simulations.
• Develop closed-loop test infrastructure.

Skills

Proficient in Rust

Proficient in Python

Understanding of rigid body dynamics

Experience with numerical modeling frameworks

Education

Bachelor's degree in Computer Science or related field

Tools

Monte Carlo testing

Physics libraries

Job description

Overview

We are a stealth-mode Aerospace & Defense startup headquartered in Gardena, CA. Our founding team hails from SpaceX, Anduril, and Lockheed Martin, and we are backed by Joint Staff-level military leadership and several Silicon Valley firms. With a world-class business development & leadership team already in place, we are well positioned to capitalize on already overwhelming demand.

Job Overview

As a GNC Engineer focused on Simulations, you will lead the development of high-fidelity physics-based simulations for end-to-end missile flight and guidance validation. These simulations serve as a digital proving ground for our flight software, autonomy stack, and control systems—enabling us to iterate rapidly and validate in silico what would otherwise require expensive, slow, or impossible real-world testing.

You’ll own simulation architecture, real-time physics integration, and testbed development. If you’re comfortable writing performant simulation code in Rust and Python, and you’re looking to do impactful work on a system that must work the first time, this is your chance.

Key Responsibilities

• Design high-performance 6-DOF flight and physics simulations
• Build simulation components that replicate real-world dynamics and sensor behavior
• Integrate guidance, navigation, and control (GNC) logic into full-stack simulations
• Develop Monte Carlo, Hardware-in-the-Loop (HITL), and closed-loop test infrastructure
• Collaborate closely with flight software, autonomy, and hardware teams to ensure simulation fidelity matches real-world constraints
• Create tooling to support scenario authoring, data visualization, and performance analysis
• Own simulation pipeline performance and determinism across a wide range of conditions

Basic Qualifications

• Bachelor's degree in Computer Science or a related technical field
• 5+ years of experience building simulations or numerical modeling frameworks
• Proficient in Rust and Python for performance-critical and test-driven development
• Understanding of rigid body dynamics, kinematics, numerical integration, and physics
• Experience building tools for flight dynamics, aerospace simulation, or autonomous systems

Preferred Qualifications

• Experience with Monte Carlo testing, sensor emulation, and closed-loop control validation
• Familiarity with real-time systems, latency-sensitive architectures, or distributed simulation
• Experience deploying or validating autonomous systems (missiles, drones, satellites, or vehicles)
• Familiarity with Rust game engines or physics libraries (e.g., Rapier, Bevy)
• Exposure to 3D rendering for simulation visualization (e.g., WebGL, OpenGL, Three.js)
• Contributions to aerospace open source or simulation frameworks (e.g., JSBSim, Gazebo)

ITAR / Legal

• To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. 1157, or (iv) Asylee under 8 U.S.C. 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here.