Six Figure Work

Sr. Mechanical Engineer (Gasification)

Arbor Energy

Company websitearbor.co (Arbor Energy, opens in new tab)

Base salary $150K  to $175K

Employer-published annual base salary, USD. Advertised base range in El Segundo, CA

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  • LocationEl Segundo, CA
  • WorkplaceWorkplace not stated
  • Status at last checkSource accepting applications when checked
  • Last checked (3 h ago) · observed since

About this job

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.

Source: Arbor Energy on Greenhouse · View original posting (opens in new tab)

Pay in context

This role's base floor ($150,000) is above 55% of the 2,072 Engineering (non-software) roles in California listed on this site; 61 others list the same floor. Their median floor is $146,500; the middle half runs from $125,000 to $175,000.

Only jobs on this site count, and each one publishes a base salary of $100,000 or more, so this compares six-figure jobs with each other, not with the whole market. Computed Nov 6, 2026.

This range next to 6 other live Arbor Energy roles with the nearest advertised base floor
Chart as a table
This range next to 6 other live Arbor Energy roles with the nearest advertised base floor
RolePublished base
Sr. Mechanical Engineer (Gasification) (this listing)$150K - $175K
Sr. Combustion Engineer (Syngas Oxyfuel)$150K - $175K
Sr. Combustion Engineer$150K - $175K
Sr. Mechanical Engineer - Turbomachinery$150K - $175K
Thermodynamics Performance Engineer$140K - $155K
Sr. Electrical Engineer - Power Systems$165K - $185K
Sr. Thermodynamics Performance Engineer$165K - $180K

Same $100K to $400K scale as every card. All Arbor Energy roles · How to read the bar

Observed changes

  1. First observed on the employer's board
  2. Began meeting the published-salary criteria
Observed since
Employer-stated posting date
2026-09-28
Where this pay comes from

Location as the employer wrote it: El Segundo, CA

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

Method
Employer text, read with fixed rules and re-verified
Checked
Rule set
us-base-v2

The pay passage appears in the employer's own job text. Fixed, deterministic rules located it, and the passage below was checked against the stored copy of the posting.

What we verified

  • The pay figures come from the employer's own listing, quoted exactly above.
  • The pay is an annual base salary in US dollars with a minimum of at least $100,000.
  • The role was publicly listed on the employer's job board when last checked.

We do not verify what the employer will actually offer, whether the employer is still recruiting for the role, or anything beyond what the employer published. Full methodology.