Senior Thermal Modeling Analyst

Radiant Industries; El Segundo (CA); On-site; USD 100,000 - 130,000; Full time

Benefits offered by this job

Substantial stock plan

Full medical coverage

Sponsored memberships

Top tier dental and vision plans

Paid parental leave

Catered lunch and free snacks

Flexible PTO policy

Team bonding events

Job summary

A leading advanced reactor company in El Segundo is seeking a Senior Thermal Modeling Analyst. This role involves executing thermal CFD analysis and developing simulation solutions for the Kaleidos microreactor. Candidates should possess a bachelor’s degree in engineering or physics and have over 5 years of experience in CFD. Strong skills in STAR-CCM+, Ansys Fluent, and Siemens NX are essential. The position is full-time and requires onsite presence. Benefits include stock options, comprehensive health coverage, and flexible PTO.

Qualifications

• Minimum 5 years of relevant industry experience.
• Proficiency in CAD software is required.
• Mastery in finite element and computational fluid dynamics methods.

Responsibilities

• Execute thermal CFD analysis for Kaleidos reactor.
• Develop solutions for turbulent flow and heat transfer.
• Implement best practices for CFD simulation.

Skills

CFD analysis

Thermal FEA modeling

Collaboration across teams

Communication skills

Education

Bachelor’s degree in engineering or physics

Tools

STAR-CCM+

Ansys Fluent

Siemens NX

Job description

Senior Thermal Modeling Analyst

Radiant is seeking a driven Senior Thermal Modeling Analyst with expertise in CFD and thermal FEA modeling. You will design, develop and implement simulations for the Kaleidos microreactor to ensure high fidelity, reliability, and safety of our systems. You’ll work on cutting edge technical problems for a high temperature gas reactor that inform decisions across reactor systems, cooling systems, shielding, and more. You will have an opportunity to work in an interdisciplinary environment and drive milestones forward to unlock commercialization of the first mass-produced nuclear reactor.

Responsibilities and Duties

• 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.

Required Qualifications and Skills

• Bachelor’s degree in engineering, physics, or similar field from an accredited institution.
• 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 and distilling information with cross‑functional teams.

Desired Qualifications and Skills

• Experience with radiation heat transport modeling.
• Knowledge of nuclear reactor design.
• Driven, self‑motivated, and takes ownership of work end to end.

Additional Requirements

• Must be willing to work extended hours and weekends as necessary to accomplish our mission.
• Must work 100% onsite at El Segundo HQ.

Benefits and Perks

• Stock: Substantial incentive stock plan for all full‑time employees.
• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
• One Medical: Sponsored memberships for employees and their dependents.
• Vision: 100% top tier plan coverage + 50% for dependents.
• Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
• Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
• 8‑weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
• Daily catered lunch. Free snacks and drinks.
• Flexible PTO policy. Remote workday allocation.
• Company and team‑bonding events, happy hours and in‑person camaraderie.
• Beautiful El Segundo headquarters close to the Pacific Ocean.

Total Compensation and Benefits

Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.

The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: [e-mail].

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status or any other characteristic protected by law.

Unfortunately, we are unable to provide visa sponsorship at this time.

This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.