Senior CFD Thermal Modeling Engineer - Nuclear Microreactors

Radiant Industries, Inc.; El Segundo (CA); Hybrid; USD 120,000 - 180,000; Full time

Benefits offered by this job

Stock options

Health benefits

Catered lunch

Flexible PTO

On-site HQ near Pacific Ocean

Job summary

Radiant in El Segundo, CA, is seeking a Senior Thermal Modeling Engineer to drive CFD simulations for the Kaleidos microreactor. You will design, develop, and implement high-fidelity simulations to ensure reliability, safety, and performance across reactor systems.

The role emphasizes collaboration across teams in a fast-paced startup, with on-site work at the El Segundo HQ, and opportunities to advance modeling capabilities and workflow automation.

Qualifications

• Bachelor's degree in engineering, physics, or similar field.
• 5+ years of relevant industry experience.
• 5+ years experience with STAR-CCM+, Ansys Fluent, or other commercial CFD code.
• Proficiency with CAD software (Siemens NX).
• Mastery of finite element and computational fluid dynamics modeling principles and methods.
• Experience communicating with cross-functional teams.

Responsibilities

• Own and execute thermal CFD analysis to evaluate design and performance of Kaleidos reactor systems.
• Develop and implement solutions to model turbulent flow, heat transfer, and multi-physics interactions.
• Identify and implement CFD simulation best practices.
• Build automated workflows to expand simulation capabilities, accuracy, and efficiencies
• Collaborate across teams and disciplines to support design of reduced order analysis methods.

Skills

CFD modeling

Thermal analysis

Cross-functional communication

CFD workflow automation

Education

Bachelor's degree in engineering/physics

Master's degree (preferred)

Tools

STAR-CCM+

Ansys Fluent

Siemens NX

Job description

Radiant in El Segundo, CA, is seeking a Senior Thermal Modeling Engineer to drive CFD simulations for the Kaleidos microreactor. You will design, develop, and implement high-fidelity simulations to ensure reliability, safety, and performance across reactor systems.

The role emphasizes collaboration across teams in a fast-paced startup, with on-site work at the El Segundo HQ, and opportunities to advance modeling capabilities and workflow automation.