# Senior Multiphysics Engineer, High Speed Reacting Flow

**Company**: Anduril
**Location**: Costa Mesa, California
**Experience**: senior
**Job type**: full-time
**Salary**: $146,000-$194,000 USD
**Category**: Engineering
**Industry**: Technology

**Apply**: https://job-boards.greenhouse.io/andurilindustries/jobs/5233015007?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_7330622e-6a6

## Description

## Job Overview

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.

## Responsibilities

- 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

## Requirements

- 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

## 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

## Benefits

- Competitive salary: $146,000-$194,000 USD per year

- Comprehensive benefits package

## Skills

### Required
- CFD analysis
- compressible flow
- heat transfer
- fluid dynamics
- Python
- MATLAB
- STAR-CCM+
- Fluent

### Nice to have
- PhD in a related field
- U.S. Secret or Top Secret security clearance
- solid rocket motors
- propulsion systems
- energetic materials
- reacting flow modeling
- chemistry and gas property tools

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Source: [Apply at job-boards.greenhouse.io](https://job-boards.greenhouse.io/andurilindustries/jobs/5233015007?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)