Lead 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 failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. 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 utilizes modern software engineering to rapidly achieve safe factory-built microreactors that leverage existing well-qualified materials. Founded in 2020 Radiant is on track to test its first reactor next year at the Idaho National Laboratory with initial customer deliveries beginning in 2028.

Lead Materials Engineer

Radiant is seeking a highly motivated Lead Materials Engineer to lead Radiants material team in the development testing and qualification of materials and related manufacturing processes used in the Kaleidos 1MW nuclear microreactor. The ideal candidate is excited to grow an in-house materials engineering organization is proficient in materials selection testing and analysis takes great ownership of their work end-to-end and thrives in a highly cross-functional fast-paced environment. You will be a key contributor to building the worlds first mass-produced rapidly-deployable nuclear reactor.

Responsibilities & Duties:

• Set the technical direction for the materials team including the definition of project scopes the guidance of day-to-day engineering and support activities and the development of a materials engineering roadmap to support future reactor designs and builds
• Accountable for materials engineering teams technical output
• Lead and mentor materials team members technically and professionally
• Communicate project status issues and schedules to teammates and executives
• Present to external stakeholders and regulatory bodies (DOE NRC)
• Review test plans purchase orders and analysis
• Provide surge materials engineering support as-needed
• Manage in-house materials lab including the identification procurement and operation of materials characterization equipment.
• Create and maintain materials team budget
• Oversee materials database and ensure accuracy and data quality of database content

Required Qualifications & Skills:

• Bachelors degree from an accredited institution in Materials Science and Engineering or in Mechanical Aeronautical Nuclear or Chemical Engineering with a materials science and engineering focus
• 5 years of experience working in the development testing and/or analysis of materials for demanding load cases and environments
• Hands-on experimental or testing experience in laboratory or production environments

Desired Qualifications & Skills:

• Masters or PhD degree from an accredited institution in Materials Science and Engineering or in Mechanical Aeronautical Nuclear or Chemical Engineering with a materials science and engineering focus.
• 2 years of engineering leadership and management experience at a company building and/or testing hardware for nuclear aerospace or other extreme environments
• Expert-level competency in at least one area of materials science including metallics and structural materials solid-state processing and/or joining of materials composites ceramics polymers and/or nuclear materials such as fuel neutron poisons or moderators
• Experience with development and qualification of material systems for high temperature irradiation and/or other extreme environments
• 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)

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.

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: .

Benefits and Perks for Eligible Employees:

• Stock: Substantial incentive stock plan for all full-time employees.
• Medical: 100% premium coverage for base Silver level plan for employee 50% premium coverage for dependents. Platinum plans available.
• One Medical: Sponsored memberships for eligible employees and their dependents.
• Vision: 100% premium coverage for top tier plan 50% for dependents.
• Dental: 100% premium coverage for top tier plan (including orthodontia) 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.

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 applicants capacity to serve in compliance with U.S. export controls.