Multiphysics Engineer, High Speed Reacting Flow

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 TeamThe 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 JobWe 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 DoRun CFD analysis of internal and high-speed flows, with and without combustionStart with hand calculations and 1D models to size a design, then move to 3D CFD to refine itPredict heat loads, surface temperatures, and pressures for the thermal and structural teamsSet up gas properties and chemistry appropriate to the conditions being modeledSupport rocket nozzle, insulation, and case design decisions with analysisBuild and document repeatable workflows so other engineers can run the same analysisCompare predictions against static fire and ground test data and improve the modelsSupport material response and erosion analysis in high-temperature environmentsWork with aerodynamics, thermal, structures, materials, and test engineersPresent results at design reviews and document the analysisRequired QualificationsMaster’s degree in Aerospace engineering, Mechanical Engineering, Chemical Engineering, Engineering Physics, or a related fieldAbility to obtain and maintain a U.S. secret security clearance5+ years of experience in CFD, aerothermal, thermal, or combustion analysisFoundational understanding of compressible flow including shocks, choked flow, and supersonic nozzlesStrong first-principles understanding of heat transfer and fluid dynamics, including conduction, convection, radiation, fluid flow, and transient thermal behaviorExperience with commercial CFD code such as STAR-CCM+, Fluent, or similar, including meshing and driving a case to convergenceProficient in applying hand calculations and 1D models to independently validate CFD resultsProgramming experience in Python, MATLAB, or similarClear technical writing and the ability to present results to customersPassion for defending the United States and her alliesPreferred QualificationsPhD in a related fieldActive U.S. Secret or Top Secret security clearanceExperience with solid rocket motors, propulsion systems, or energetic materialsExperience with reacting flow modeling — finite-rate or equilibrium chemistry and species transportExperience with chemistry and gas property tools such as NASA CEA, Cantera, or CHEMKINExperience selecting solvers and flux schemes for shock-dominated flowsExperience with high-temperature or high-enthalpy flowExperience with ablative or charring materials and surface heat transferExperience with multiphase or particle-laden flowExperience with exhaust plumes, jet interaction, or base flowExperience comparing models against instrumented test dataScripting and automation experience (Python, STAR-CCM+ Java macros, or Fluent journaling and UDFs)Graduate research in aerothermodynamics, combustion, propulsion, or thermal protection materials andUS Salary Range$129,000—$171,000 USDThe 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: BenefitsAt 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 ScamsAnduril is committed to maintaining the integrity of our Talent acquisition process and the security of our candidates. We've observed a rise in sophisticated phishing and fraudulent schemes where individuals impersonate Anduril representatives, luring job seekers with false interviews or job offers. 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