Anduril Industries is a defense technology company with a mission to transform U.S. and allied military capabilities with advanced technology. By bringing the expertise, technology, and business model of the 21st century’s most innovative companies to the defense industry, Anduril is changing how military systems are designed, built and sold. Anduril’s family of systems is powered by Lattice OS, an AI-powered operating system that turns thousands of data streams into a realtime, 3D command and control center. As the world enters an era of strategic competition, Anduril is committed to bringing cutting-edge autonomy, AI, computer vision, sensor fusion, and networking technology to the military in months, not years.

About the Team

The Multiphysics Team's work is essential to support our rapid innovation cycle and improve the performance and reliability of advanced defense technologies. Multiphysics Engineers combine computational and experimental methods to size, design, and optimize systems involving complex, coupled physics processes and environments. This team operates with full design ownership through the product development cycle, moving from system-level and first-principles models to 3D simulation and validation/product testing.

About the Job

We are looking for a Multiphysics Engineer to join our team in Costa Mesa, CA. In this role you will own the internal flow, combustion, and heat transfer analysis behind air vehicle propulsion systems.

We are looking for strong fundamentals in compressible flow and heat transfer, and a track record of quickly delivering useful results.

What You’ll Do

Run CFD analysis of internal and high-speed flows, with and without combustion
Start with hand calculations and 1D models to size a design, then move to 3D CFD to refine it
Predict heat loads, surface temperatures, and pressures for the thermal and structural teams
Set up gas properties and chemistry appropriate to the conditions being modeled
Support rocket nozzle, insulation, and case design decisions with analysis
Build and document repeatable workflows so other engineers can run the same analysis
Compare predictions against static fire and ground test data and improve the models
Support material response and erosion analysis in high-temperature environments
Work with aerodynamics, thermal, structures, materials, and test engineers
Present results at design reviews and document the analysis

Required Qualifications

Master’s degree in Aerospace engineering, Mechanical Engineering, Chemical Engineering, Engineering Physics, or a related field
Ability to obtain and maintain a U.S. secret security clearance
5+ years of experience in CFD, aerothermal, thermal, or combustion analysis
Foundational understanding of compressible flow including shocks, choked flow, and supersonic nozzles
Strong first-principles understanding of heat transfer and fluid dynamics, including conduction, convection, radiation, fluid flow, and transient thermal behavior
Experience with commercial CFD code such as STAR-CCM+, Fluent, or similar, including meshing and driving a case to convergence
Proficient in applying hand calculations and 1D models to independently validate CFD results
Programming experience in Python, MATLAB, or similar
Clear technical writing and the ability to present results to customers
Passion for defending the United States and her allies

Preferred Qualifications

PhD in a related field
Active U.S. Secret or Top Secret security clearance
Experience with solid rocket motors, propulsion systems, or energetic materials
Experience with reacting flow modeling — finite-rate or equilibrium chemistry and species transport
Experience with chemistry and gas property tools such as NASA CEA, Cantera, or CHEMKIN
Experience selecting solvers and flux schemes for shock-dominated flows
Experience with high-temperature or high-enthalpy flow
Experience with ablative or charring materials and surface heat transfer
Experience with multiphase or particle-laden flow
Experience with exhaust plumes, jet interaction, or base flow
Experience comparing models against instrumented test data
Scripting and automation experience (Python, STAR-CCM+ Java macros, or Fluent journaling and UDFs)
Graduate research in aerothermodynamics, combustion, propulsion, or thermal protection materials and systems

US Salary Range

$146,000—$194,000 USD

The salary range for this role is an estimate based on a wide range of compensation factors, inclusive of base salary only. Actual salary offer may vary based on (but not limited to) work experience, education and/or training, critical skills, and/or business considerations. Highly competitive equity grants are included in the majority of full time offers; and are considered part of Anduril's total compensation package. Additionally, Anduril offers top-tier benefits for full-time employees, including:

Benefits

At Anduril, we invest in our people. Our comprehensive, competitive benefits package (available at little to no cost to employees) ensures you’re supported in health, recovery, and whatever comes next. For more information, Explore Our Benefits.

Protecting Yourself from Recruitment Scams

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To ensure your safety and help you navigate your job search with confidence, please keep the following critical points in mind:

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Senior Multiphysics Engineer, High Speed Reacting Flow

About the role