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Principal Thermofluids Engineer

Lumicity
El Segundo, CA Full Time
POSTED ON 9/19/2026
AVAILABLE BEFORE 11/13/2026

Lead/Sr Thermofluids Engineer - El Segundo, CA - Industrial Power/Heat Exchangers


I’m supporting an early-stage startup in El Segundo, CA area that is building a next-generation industrial power conversion system, and I’m looking for a Lead/Senior Thermofluids Engineer who wants true ownership of core hardware.


This person will own the thermal-fluid design of critical heat-exchange hardware and architecture that directly drives system performance, efficiency, and test success.


The work will involve:

  • Thermal-hydraulic design and sizing of compact, high-performance heat exchangers
  • Pressure drop, heat transfer, and flow distribution analysis
  • 1D modeling alongside 3D CFD
  • Taking designs from early architecture through fabrication, inspection, build, and test
  • Working directly with founders and cross-functional leads
  • Coordinating closely with external vendors / fabricators on advanced heat-exchange hardware


Ideal background would include experience with some combination of:

  • Compact heat exchangers, plate-fin, or similar architectures
  • High-pressure / high-temperature thermal-fluid systems
  • Combustion-side heat transfer or pressure-containing thermal hardware
  • Thermal stress, pressure-boundary considerations, ASME-related design practices


This is a good fit for someone who wants to move fast, own meaningful hardware, and be early enough in a company to actually shape the product rather than inherit it.


If this sounds like you, or someone in your network, send me a message or email me directly at coleman.carpenter@lumicity.io and I'll be in touch promptly.


Lead/Sr Thermofluids Engineer - El Segundo, CA - Industrial Power/Heat Exchangers

Salary.com Estimation for Principal Thermofluids Engineer in El Segundo, CA
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