Radiant
Overview
Radiant is an El Segundo, CA-based startup building portable nuclear microreactors. The company’s 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 refueling. Radiant aims to replace similar-sized diesel generators and support critical assets for hospitals, data centers, remote sites, and military bases. Founded in 2020, Radiant plans to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028. Radiant is seeking a highly motivated Materials Engineer to own development, testing, and qualification of materials and related manufacturing processes used in the Kaleidos 1MW nuclear microreactor. The ideal candidate takes ownership of their work end-to-end, is proficient in materials selection, testing, and analysis, and thrives in a cross-functional, fast-paced environment. You will be a key contributor to building the world\'s first mass-produced, rapidly-deployable nuclear reactor. 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 the company materials database. Define or improve manufacturing processes of components to achieve desired material properties. Required Qualifications & Skills
Bachelor’s 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 developing, testing, and/or analyzing 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 & Skills
Master’s or PhD degree 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. 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\'s new hire compensation package includes base salary, substantial equity grants, and comprehensive benefits. Total compensation and level are determined through a holistic evaluation of your interview performance, experience, education, and qualifications. Benefits and Perks for Eligible Employees
Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% coverage up to base silver level plan for employee and 50% for dependents, with options up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA benefits available. 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 and 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.
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Radiant is an El Segundo, CA-based startup building portable nuclear microreactors. The company’s 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 refueling. Radiant aims to replace similar-sized diesel generators and support critical assets for hospitals, data centers, remote sites, and military bases. Founded in 2020, Radiant plans to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028. Radiant is seeking a highly motivated Materials Engineer to own development, testing, and qualification of materials and related manufacturing processes used in the Kaleidos 1MW nuclear microreactor. The ideal candidate takes ownership of their work end-to-end, is proficient in materials selection, testing, and analysis, and thrives in a cross-functional, fast-paced environment. You will be a key contributor to building the world\'s first mass-produced, rapidly-deployable nuclear reactor. 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 the company materials database. Define or improve manufacturing processes of components to achieve desired material properties. Required Qualifications & Skills
Bachelor’s 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 developing, testing, and/or analyzing 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 & Skills
Master’s or PhD degree 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. 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\'s new hire compensation package includes base salary, substantial equity grants, and comprehensive benefits. Total compensation and level are determined through a holistic evaluation of your interview performance, experience, education, and qualifications. Benefits and Perks for Eligible Employees
Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% coverage up to base silver level plan for employee and 50% for dependents, with options up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA benefits available. 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 and 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.
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