Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, 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 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. Radiant’s 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.
Mechanical Designer
Radiant is seeking a Mechanical Designer to support critical path development as we near the first prototype test in 2026. You will create drawings with inputs from responsible engineers, serve as a GD&T expert for the team when checking drawings, and manage models/assemblies. This is an excellent opportunity to enable mechanical, fluids, nuclear, and structural engineers in building a highly reliable, portable nuclear microreactor. The ideal candidate has keen attention to detail, excellent CAD abilities, and can juggle multiple competing priorities.
Responsibilities and Duties:
- Create, review, and finalize 2D engineering drawings in NX for subsystems and components for a nuclear microreactor.
- Manage large assemblies or assist with complex 3D model creation.
- Work closely with engineers to resolve issues and document changes including requirements, process updates, assembly modifications, and more.
- Create and update templates and drawing notes to stay up to date.
- Manage queue of revision requests and prioritize with team to identify and solve design-related issues.
Required Skills and Qualifications:
- Bachelor’s degree from an accredited institution in engineering.
- 1+ years working experience with drafting, modeling, and managing assemblies in CAD software.
- 1+ years' experience in NX for CAD modeling and engineering drawings.
- Experience with Teamcenter.
- Proficient in GD&T concepts and application.
Desired Skills and Qualifications:
- Familiarity with metallic structures, welded structures, and fluid systems.
- Experience designing and managing large CAD models and drawings.
- Ability to manage multiple drawings and models at a time effectively and with accuracy.
- Strong ability to communicate well and frequently with interdisciplinary engineers across engineering and leadership.
- Proactive and self-motivated with excellent ability to document processes and drawings and ensure up-to-date notes.
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% 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.
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.
Top Skills
What We Do
Radiant is a 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. 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.
Why Work With Us
Our world-class team has prior experience in complex hardware development from SpaceX, McMaster, The Boring Company, and renowned national laboratories that define our mentality to radically improve our microreactors. We care deeply about our mission to reduce carbon emissions, and have fun while doing so from trivia nights to ski retreats.
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