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Role description

Sr. Mechanical Engineer (Gasification)

Arbor Energy logoArbor Energy
SenioritySenior
Salary$150,000–$175,000
LocationEl Segundo, CA
Posted9/28/2026
Engineering

About Us

At Arbor Energy & Resources Corporation ("Arbor Energy"), we’re creating technology to power our lives while protecting the planet that sustains them.  Our advanced power systems deliver clean, reliable baseload electricity with zero operating emissions—modular, fuel-flexible, and engineered for the realities of today’s energy demand. At the core is a supercritical CO₂ turbine with integrated carbon capture, designed to bring carbon-neutral power online quickly at meaningful scale. 

Our team includes aerospace engineers, combustion experts, and systems thinkers with a shared goal: to build technology worthy of the world we want to live in. While many of us began our journeys looking to the stars, we’re applying that expertise here at home to deliver dependable, emission-free baseload power and a future of lasting abundance.  

If you share our values and are drawn to rigorous work with lasting impact, we’d love to learn more about you. Come build what the future will run on.

Steward our planet: We build for tomorrow, ensuring every bolt we tighten and every hand we lend leaves our environment stronger than we found it.

Lead with Love: We champion the success of our people, partners, and planet, nurturing excellence through camaraderie and rigor.

Explore the Uncharted: We embrace the unknown with curiosity, using courage and discipline to transform uncertainty into opportunity.

Role Overview

We are seeking a Sr. Mechanical Engineer (Gasification) to take ownership of the development, testing, and optimization of our novel biomass gasification systems, solids feed and removal systems, and feedstock pretreatment systems to enable reliable, high efficiency conversion as we scale from demonstration to pilot and beyond. As a core member of a small, hands-on gasification team, you’ll guide daily operations, execute testing, and lead design improvements to ensure safe, reliable, and high-performing systems.

Responsibilities

  • Execute design, procurement, assembly, testing and operation of high-pressure solids feed and removal hardware. 
  • Contribute to 3D modeling, structural analysis, fabrication drawings and PFD’s / fluid P&ID’s as well as test plans and procedures. 
  • Find robust, cost-effective solutions to solve Arbor’s electro-mechanical, thermal, and fluid system design problems. 
  • Manage large assembly BOMs and work across departments to deliver project results. 

Requirements

  • Bachelor’s degree in Mechanical, Aerospace, Chemical Engineering, or related field. 
  • 7+ years of experience in combustion system design, analysis, and testing. 
  • Experience with electro-mechanical and/or chemical conversion systems. 
  • Strong understanding of thermodynamics, fluid mechanics, and heat transfer. 
  • Hands-on experience with high-temperature and pressure equipment. 
  • Demonstrated ability to own product lifecycle from conceptual design to validation. 

Preferred Qualifications

  • Master's degree in Mechanical, Aerospace, Chemical Engineering, or related field. 
  • Experience with biomass or solids conveyance and feeding systems. 
  • Knowledge of chemical kinetics and fuel property effects on combustion behavior. 
  • Programming or scripting skills for data reduction and automation (Python, MATLAB, or similar). 
  • Experience working in startup or experimental R&D environments. 

Benefits & Compensation 

  • Stock options 
  • Medical, dental, and vision insurance (Arbor covers 90% for employees) 
  • Basic life insurance fully covered 
  • Health savings account (HSA) with matching 
  • Flexible savings account (FSA) 
  • Unlimited PTO   
  • 12+ company holidays, including Earth Day!   
  • 401(k) 
  • Commuter benefits 
  • Annual learning and development stipend 
  • And more! 

Base Pay: $150,000 - $175,000 USD/year. The salary is subject to the applicant's skills, qualifications, experience, and geographic location.

Our Commitment

Arbor Energy is proud to be an equal opportunity employer. We evaluate qualified applicants without regard to race, religion, national origin, gender identity or expression, sexual orientation, age, marital or veteran status, disability, or any other protected characteristic under applicable law. Solving global energy challenges requires a wide range of perspectives and experiences, and we are committed to building a team that reflects the world we serve.

Our hiring process is designed to be accessible, fair, and focused on the work that matters most for this role. Reasonable accommodations are available throughout the hiring process and employment—please let us know if you need one.

Company info

Arbor Energy logo

Arbor Energy

Rocket engineering for power generation.

Arbor is a next-generation turbine company using rocket engineering to deliver clean firm power. Rocket engines generate enormous power out of very small volumes. Arbor applies that approach to power generation, using supercritical CO₂ to deliver the same power from a turbine roughly one-tenth the size of a conventional one. Turbine engineering supplies the materials and cooling a power system needs to run continuously for decades. Arbor’s power system, HALCYON, uses oxy-combustion—burning fuel in pure oxygen—to eliminate NOx, SOx, and particulate emissions. This process enables CO₂ to be captured directly from the fuel and stored permanently underground. It also produces water, so a plant can operate without drawing on local water supplies. Each HALCYON unit delivers 25 MW, and units can run independently or get combined into plants of 100 MW and more as demand grows. Components are additively manufactured on standard 3D printers, offering a path outside the legacy supply chains th

Private companySeries AHiring fast
Founded

Relevant archetypes

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2022
HQLos Angeles, United States
Size51–200 employees
IndustryElectric Power Generation
Latest fundingSeries A · Oct 21, 2025
Investors
Lowercarbon CapitalVoyager Ventures

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