Arbor Energy

Combustion Analysis Engineer

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El Segundo, CA

In-Office

Energy • Renewable Energy

The Role

Arbor’s team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected. Our modular technology leverages the power density of supercritical CO2 to enable compact gasification, oxy-combustion, and high-pressure turbo-expansion to convert abundant waste biomass into clean electricity, water, and high-purity CO2, capturing and sequestering all emissions from the process. Our team brings together a passion for science, technology, and global stewardship to make low-cost, high-quality carbon removal and baseload power a reality.

We're looking for a Combustion Analysis Engineer to perform fluid, thermal, and structural analyses on our novel combustion systems—bringing high-performance engineering to the fight against climate change. You'll work closely with combustion engineers and designers to inform and accelerate development using advanced simulation tools, algorithmic workflows, and additive manufacturing. Your work will help bridge modeling and reality through system integration and hot-fire test validation.

Responsibilities

Perform CFD, transient thermal, and structural analyses on combustion hardware.
Collaborate with combustion and mechanical engineers to develop practical, testable designs.
Use integrated system models to inform design direction and support performance prediction.
Help anchor simulation results with hot-fire test data and iterate models accordingly.
Contribute to a fast-paced, collaborative team with a focus on climate-impactful technology.

Requirements

Bachelor’s degree in Mechanical, Aerospace, or related Engineering field.
3+ years of experience in fluid dynamics, CFD, and transient thermal analysis.
Strong foundation in compressible and incompressible fluid mechanics.
Experience with CFD tools like StarCCM+, ANSYS CFX, or FLUENT.
Proficient in Python, MATLAB, or similar scripting tools for automation and post-processing.
Strong ownership mentality and eagerness to work collaboratively in a small, dynamic team.

Preferred Qualifications

5+ years of experience in propulsion or combustion analysis.
Master’s or Ph.D. in Mechanical, Aerospace, or Electrical Engineering.
Experience working in startup or agile development environments.
Familiarity with conjugate heat transfer simulations.
Interest in or ability to lead and grow a small analysis team over time.

Arbor is an equal-opportunity employer. We never discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. Building a global solution to this global problem will require humans of all varieties to contribute diverse ideas and experiences, so we have put finding and hiring qualified individuals from underrepresented groups at the top of our priority list.

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At Arbor, we’re sustainably powering the present while erasing emissions of the past. Our innovative system transforms organic waste into clean, reliable electricity while capturing carbon dioxide at scale.

Founded by space tech veterans who pivoted from building technology to explore new planets to protecting our own, Arbor leverages cutting-edge aerospace technology to tackle climate change. Our mission is to bring gigawatts of clean, dependable baseload power online while removing gigatons of legacy carbon emissions. Earth is the most important spaceship we’ll ever have, and we’re dedicated to restoring its balance.

Drawing on our team’s deep aerospace expertise, we’ve created a power system that meets today’s demands while repairing yesterday’s damage. Arbor’s engine, fueled by organic waste, improves on Bioenergy with Carbon Capture and Storage (BECCS) using advancements in oxy-combustion, supercritical turbomachinery, and additive manufacturing. The system turns waste—like overgrown brush, crop residues, and food waste—into clean power, reducing wildfire risks and landfill emissions. The captured CO2 is permanently stored deep underground, where it mineralizes into rock, ensuring it never returns to the atmosphere.

At Arbor, we envision a future where human progress and environmental stewardship work in harmony to power our world and bring the planet into balance. We’re proudly backed by climate-focused investors including Gigascale Capital, Voyager Ventures, Lowercarbon Capital, and Cantos Ventures.