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Arbor Energy

Sr. Thermodynamics Performance Engineer

Arbor Energy · El Segundo, CA

Posted about 3 months ago · $165,000 - $180,000

or apply directly on Arbor Energy's site. We never take the application ourselves.

Is this posting real?

This role has been open
82 days
Arbor Energy's roles stay open a median of 83 days
Reposted
No
Salary listed
Yes
95% of Arbor Energy's roles list one
Ghost-job risk at Arbor Energy
high
15 stale, 0 reposted of 19 open
Hiring momentum
24 roles opened in the last 90 days
↑ up vs. the prior 90 days
Last confirmed on the employer's board
2026-10-25

Measured from postings appearing on and disappearing from Arbor Energy's own greenhouse board since 2026-08-03. Full hiring picture for Arbor Energy.

About this role

The Sr. Thermodynamics Performance Engineer at Arbor Energy will be responsible for owning and advancing the thermodynamic models of a supercritical CO₂ Brayton cycle. This role involves running performance studies, reconciling model predictions with test data, and collaborating with various engineering teams to enhance the simulation capabilities of the power system. The engineer will also develop simulation infrastructure to support broader engineering use.

Our read on this posting4.2out of 5
benefits
5/5
freshness
1/5
career value
5/5
role clarity
5/5
pay transparency
5/5

Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Arbor Energy as an employer.

What you need

  • Bachelor's degree in Chemical, Mechanical, Aerospace, Nuclear, or related Engineering field
  • 6+ years of experience in cycle performance analysis, thermodynamic systems modeling, or dynamic process simulation
  • Strong fundamentals in thermodynamics, fluid mechanics, and heat transfer, applied to integrated multi-component systems
  • Demonstrated experience building dynamic simulation models of fluid/thermal systems in an industry-grade 1D system simulation platform
  • Working knowledge of integrated power loop equipment and its dynamic response
  • Programming proficiency in Python and one of MATLAB/Simulink, Modelica, or equivalent

Nice to have

  • Deep experience with industry dynamic simulation platforms applied to turbomachinery, power cycles, or closed-loop thermal-fluid systems
  • Background in nuclear thermal-hydraulics with fast-dynamic single-phase modeling experience
  • Working knowledge of real-fluid EOS handling and turbomachinery map interpolation near critical conditions
  • History of making and defending tool/methodology decisions in a constrained engineering environment
  • Experience with supercritical CO₂, closed Brayton cycles, high-pressure systems, or other high-density working fluids

What you get

  • Pre-IPO 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

Worth weighing

  • Onsite opportunity in El Segundo, CA may limit remote work options
  • The role requires strong ownership and analysis in a fast-paced startup environment, which may not suit everyone
  • Base pay is stated but may vary based on skills and experience, so candidates should be prepared for negotiation

Summarised from Arbor Energy's posting. Read the full original.

Listed by Arbor Energy on their greenhouse job board, last confirmed open on 2026-10-25. PitchMeAI is not the employer.

More roles at Arbor Energy

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