Arbor Energy

Fluids System Build Engineer

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El Segundo, CA

In-Office

125K-150K Annually

Energy • Renewable Energy

The Role

We are seeking a Fluids System Build Engineer to design, procure, and oversee construction of fluid systems for testing advanced equipment. This role involves specifying components, assembling and integrating fluid systems, and ensuring reliable operation under test conditions. The ideal candidate has experience with high-pressure systems, fluid dynamics, and working with hazardous gases and liquids. This position requires hands-on work in a fast-paced environment with up to 40% travel to our test site in San Bernardino, CA.

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.

Responsibilities:

Design and specify fluid system components, including pumps, valves, regulators, and piping.
Procure and manage inventory of fluid system components and materials.
Manage modifications, new construction, and commissioning of fluid systems to support equipment testing.
Ensure compliance with industry standards and safety regulations.
Work closely with test engineers to optimize fluid system design requirements performance.
Troubleshoot and resolve issues related to fluid system operation.
Develop documentation, including schematics, equipment data sheets, procedures, and maintenance plans.
Support commissioning and field operations at test sites as needed.

Requirements:

Bachelor’s degree in Mechanical, Chemical, or a related engineering field.
3+ years of experience designing and building fluid or piping systems.
Knowledge of pumps, valves, regulators, and pressure vessels.
Experience with high-pressure and hazardous fluid systems.
Strong hands-on fabrication and assembly skills.
Ability to read and create P&IDs and system schematics.

Preferred Qualifications:

Experience with API, ASME, ANSI, and NFPA fluid system standards.
Familiarity with cryogenic, high-pressure gas, and high-performance liquid systems.
Knowledge of welding, tubing, and pipefitting techniques.
Experience in commissioning activities such as leak testing, pressure testing, and instrumentation validation.
Proficiency in CAD tools (such as Siemens NX) for 3D design of piping and equipment layout.
Comfortable working in a startup or R&D environment.
Strong problem-solving and troubleshooting skills.

Benefits:

Equity: The business opportunity for carbon removal technology is growing rapidly, and we want our team to share in Arbor's successes, so we offer stock options to all employees. 

Extensive medical benefits, including Health, Dental, and Vision, and Life Insurance

Company FSA and HSA contributions

Unlimited PTO 

12+ company holidays, including Earth Day! 

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.