2027 New Graduate Materials Engineer

Radiant is an El Segundo CA-based startup building the worlds first mass-produced portable nuclear microreactors. The companys first reactor Kaleidos is a 1-megawatt fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals data centers remote sites and military bases. Radiants unique practical approach to nuclear development leverages modern software engineering to rapidly deliver safe factory-built microreactors that use existing well-qualified materials. Founded in 2020 Radiant is on track to test its first reactor at the Idaho National Laboratory this summer with initial customer deliveries beginning in 2028.

Radiant is seeking a highly motivated Materials Engineer to join the team.

Responsibilities:

• Plan and execute materials testing to obtain material properties to inform design decisions.

• Develop and qualify application-specific manufacturing processes related to metals ceramics composites or polymers.

• Provide expert guidance in materials selection for components within Kaleidos.

• Identify procure and operate equipment for materials characterization and testing.

• Evaluate data quality and accuracy of material property data for use in company materials database.

• Define or improve manufacturing processes of components to achieve desired material properties.

Qualifications:

• BS or MS in Materials Engineering Mechanical Engineering or a related discipline.

• Graduating December 2026 or Spring 2027

• Experience working in the development testing and/or analysis of materials for demanding load cases and environments from projects laboratory work research internships or prior work experience

• Hands-on experimental or testing experience in laboratory or production environments

Desired Qualifications:

• Enrolled in a Masters or PhD degree from an accredited institution in Materials Science and Engineering or in Mechanical Aeronautical Nuclear or Welding Engineering with a materials science and engineering focus.

• Experience with development and qualification of solid-state processing of materials.

• Knowledge of standard test methods for materials and experience with development of design allowables.

• Self-motivated with strong organizational written and oral communication skills.

• Demonstrated ability to work collaboratively with design and operations teams to deliver high-value results.

• Experience with using text-based software development tools (Python or similar).

• 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. Radiants 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 todays advanced reactor builders dont wait for job postings. They join the winning team. If thats you contact us directly for immediate opportunities: .

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.

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

Required Experience:

IC