Senior Turbomachinery Engineer, Nuclear Power Systems

Speedrun Talent Network; El Segundo (CA); On-site; USD 180,000 - 250,000; Full time

Benefits offered by this job

Stock options

Medical plan

One Medical

Vision plan

Dental plan

Parental leave

Job summary

Radiant, based in El Segundo, CA, is building transportable nuclear microreactors. We are seeking a Staff Turbomachinery Engineer to own the mechanical design of the core rotating assembly in our 1MW Brayton-cycle power system.

You will drive rotor dynamics, structures, bearings, seals, and system integration, partnering with electrical, thermal, and manufacturing teams to deliver production-ready turbomachinery. This hands-on role demands high ownership and engineering rigor.

Qualifications

• B.S. in Mechanical Engineering or related field.
• 8+ years designing high-speed rotating machinery (turbines, compressors, or similar).
• Deep expertise in structural analysis and mechanical design of turbomachinery.
• Experience with bearings, seals, and high-speed shafting design.
• Hands-on experience with assembly, integration, and troubleshooting of turbomachinery.

Responsibilities

• Serve as Responsible Engineer for the turbomachinery mechanical system.
• Own the mechanical architecture and design strategy for high-speed rotating assemblies (up to ~30 krpm).
• Lead rotor dynamics, structural integrity, and life analysis for rotating components and assemblies.
• Define and flow down requirements from system-level constraints including thermal, structural, and operational environments.
• Make key technical decisions on rotor layout, shafting, bearings, seals, materials, and clearances.
• Ensure designs meet performance, reliability, safety, and regulatory requirements.
• Establish and uphold standards for mechanical design rigor, analysis quality, and documentation.

Skills

Rotordynamics

High-speed machinery

Mechanical intuition

System-level thinking

Engineering judgment

Education

B.S. in Mechanical Engineering

M.S. or Ph.D. in Mechanical Engineering

Tools

ANSYS

NX

Teamcenter

Job description

Radiant, based in El Segundo, CA, is building transportable nuclear microreactors. We are seeking a Staff Turbomachinery Engineer to own the mechanical design of the core rotating assembly in our 1MW Brayton-cycle power system.

You will drive rotor dynamics, structures, bearings, seals, and system integration, partnering with electrical, thermal, and manufacturing teams to deliver production-ready turbomachinery. This hands-on role demands high ownership and engineering rigor.