Sr. Mechanical Design Engineer (Turbomachinery)

Reposted 12 Days Ago
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Hiring Remotely in El Segundo, CA
Remote or Hybrid
150K-170K Annually
Senior level
Energy • Renewable Energy
The Role
Lead the design and analysis of rotors and casings for turbomachinery, focusing on performance, materials, and structural integrity using advanced simulations and analysis tools.
Summary Generated by Built In
At Arbor, 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’re drawn to rigorous work with lasting impact, we’d love to hear from you. Come build what the future will run on.  

We are seeking a Sr. Mechanical Design Engineer to lead the design and analysis of rotors and casings for turbomachinery in a supercritical CO₂-based power cycle. This role involves conceptual design, assembly architecture selection, material selection, and structural analysis, ensuring high-performance, reliable operation under demanding conditions. The ideal candidate has expertise in bolted joint and seal design, finite element analysis (FEA), and thermomechanical analysis, with preferred experience in creep analysis and rotordynamics. 

Responsibilities

  • Design and optimize rotors and/or casings for high-performance turbomachinery using NX. 
  • Select assembly architectures and materials to meet performance and reliability requirements. 
  • Size and analyze bolted joints, seals, and piping flanges for structural integrity. 
  • Perform static and transient thermomechanical analysis using ANSYS. 
  • Conduct modal analysis of both stationary and rotating systems to evaluate dynamic behavior. 
  • Perform thermal analysis to assess the effects of temperature gradients and thermal expansion. 
  • Ensure designs meet operational, thermal, and mechanical performance requirements. 
  • Collaborate with combustion and systems teams. 
  • Support manufacturing, assembly, and testing efforts to validate designs. 

Requirements

  • Bachelor’s degree in Mechanical, Aerospace, or a related Engineering field. 
  • 5+ years of experience in turbomachinery design or mechanical system engineering. 
  • Proficiency in ANSYS FEM software for stress, thermal, and thermomechanical analysis. 
  • Strong understanding of bolted joint, seal, and flange design. 
  • Experience with static, transient, and thermal structural analysis of rotating systems. 
  • Familiarity with materials selection for high-stress and high-temperature applications. 

Preferred Qualifications

  • Experience in creep analysis for high-temperature applications. 
  • Knowledge of rotordynamics and vibration analysis of rotating machinery. 
  • Familiarity with bearing design, damping, and balancing of rotating components. 
  • Experience working with supercritical CO₂ or high-density working fluids. 
  • Proficiency in NX CAD software  
  • Experience in startup or R&D environments. 

Benefits

  • 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! 

Arbor 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.

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The Company
HQ: Los Angeles, CA
0 Employees
Year Founded: 2022

What We Do

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.

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