Job Details

Radiant is an El-Segundo, CA-based clean energy startup building a nuclear microreactor. A climate-friendly alternative to diesel generators, Radiant's Kaleidos 1MW microreactor will be the world's first portable, zero-emissions power source that works anywhere. We plan to test our development reactor by 2026 and if successful, it will be the first new commercial reactor design to achieve a fueled test in over 50 years. Radiant's goal is to bring one of the world's first factory-constructed microreactors to market. Our microreactor can bring power to remote parts of the world and provide backup power for life-saving applications in hospitals or disaster-relief scenarios.

Senior Manufacturing Engineer

Radiant is seeking a highly motivated senior manufacturing engineer who will be working closely with design engineers to innovate on the production of complex mechanisms and structures critical to our microreactor technology. You will ensure reliable, safe, quality, and delivery of the Kaleidos demonstration unit that will test in 2026 at the Idaho National Lab and be instrumental to testing the first new reactor design in over 50 years.

Responsibilities and Duties:

• Responsible for the manufacturing and inspection process for critical components and assemblies within the Kaleidos microreactor.
• Partner with design engineers to develop innovative production methods for complex mechanisms and structures.
• Develop, qualify, and refine manufacturing processes to meet all design and business requirements including safety, quality, efficiency, and delivery.
• Develop and execute manufacturing specifications and fabrication instructions.
• Manage manufacturing bill-of-materials (mBOM) for components and assemblies.
• Identify and develop appropriate suppliers for component sourcing and fabrication.
• Identify, plan, and execute capital equipment, machine, and layout upgrades to meet evolving production requirements.
• Drive initiatives for continuous improvement in manufacturing processes and product quality.

Required Skills and Qualifications:

• Bachelor's degree from an accredited institution in mechanical, manufacturing, or other related engineering discipline.
• 4+ years of experience with manufacturing of mechanical products in a production environment, preferably in high-tech or energy sectors.

Desired Skills and Qualifications:

• Master's degree from an accredited institution in mechanical, manufacturing, or other related engineering discipline.
• Experience with machining and ancillary operations such as milling, turning, grinding, EDM of materials.
• Experience with interpreting engineering drawings and models, Geometric Dimensioning & Tolerancing (GD&T).
• Experience with inspection systems including manual gauges and coordinate-measuring machine (CMM).
• Experience with non-destructive testing/non-destructive evaluation (e.g. fluorescent penetrant inspection, radiography, eddy current).
• Experience with custom machine design; electromechanical systems, motors, actuators, linear rails, bearings, lifting/rigging, etc.
• Experience with design of multi-component assemblies in CAD (NX or similar).
• Strong problem-solving skills and attention to detail.
• Self-motivated with strong organizational, written, and oral communication skills.
• Demonstrated ability to work collaboratively with design and operations teams.

Additional Requirements:

• Must be willing to work extended hours and weekends as necessary to achieve company goals.
• Must work 100% onsite at El Segundo HQ.

Employee Benefits for Eligible Employees:

• Stock: Substantial incentive stock plan for all full time, salaried 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.
• Voluntary Life, Accident, Hospital, Critical Illness, Commuter and FSA are offered as employee contributed benefits.
• Free snacks and drinks onsite.
• Flexible PTO policy.

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.