Lead Thermofluids Engineer – Heat Exchangers for MW sCO2

Lazarus; Hawthorne (CA); On-site; USD 150,000 - 230,000; Full time

Job summary

Lazarus is building the next generation of power conversion technologies. This role focuses on heat-exchanger design for MW-class sCO₂ power blocks, owning the recuperator, primary heat exchanger, and air cooler.

You will size, model, and validate high-temperature cores, coordinating with cycles, structures, and manufacturing teams to drive performance from concept through test. You will lead thermofluid design, conduct 1D and 3D analyses, and guide vendors through hand-off to fabrication.

Qualifications

• Strong fundamentals in heat transfer, fluid mechanics, and thermodynamics.
• Experience with heat-exchanger thermal-hydraulic design and sizing (effectiveness/NTU, pressure drop, heat transfer prediction).
• Proficiency in 1D/network modeling and 3D CFD (conjugate heat transfer preferred).
• Experience taking heat-exchanger designs into fabricated hardware (either internally or working with vendors).
• Excellent communication and leadership skills and a willingness to learn / teach.

Responsibilities

• Lead thermofluid design of the recuperator, primary HX, and air cooler for the MW unit.
• Own effectiveness/NTU, pressure-drop sizing, and channel geometry of the heat exchanger cores.
• Own performance prediction across the steady-state and off-design envelope.
• Drive 1D/network thermal-hydraulic modeling and 3D CFD for sizing, header / manifold design, and flow uniformity
• Coordinate with the cycles, structures, and manufacturing leads on state points, interfaces, and sizing
• Own vendor and fabricator coordination for all heat exchangers from design hand-off through build and acceptance
• Support build, inspection, and test of heat-exchange hardware.

Education

Bachelor’s degree or higher in mechanical or aerospace engineering or similar.

Job description

Lazarus is building the next generation of power conversion technologies. This role focuses on heat-exchanger design for MW-class sCO₂ power blocks, owning the recuperator, primary heat exchanger, and air cooler.

You will size, model, and validate high-temperature cores, coordinating with cycles, structures, and manufacturing teams to drive performance from concept through test. You will lead thermofluid design, conduct 1D and 3D analyses, and guide vendors through hand-off to fabrication.