Staff Manufacturing Engineer, DFM

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 Senior Manufacturing Engineer to help transition Kaleidos from a first-of-a-kind reactor build into a repeatable scalable production system.

With the initial Kaleidos reactor build complete Radiant is now applying what we learned through design fabrication assembly integration and test to the next generation of the product. This includes reducing mass and part count improving manufacturability and assembly increasing production repeatability and developing the processes tooling equipment suppliers and quality controls required to manufacture reactors at scale.

In this role you will work closely with design quality test supply chain and operations engineers to influence hardware from the earliest stages of design through fabrication and final assembly. You will own manufacturing processes for critical reactor components mechanisms structures and integrated assemblies ensuring designs can be built safely reliably and repeatedly while meeting demanding performance and quality requirements.

You will be expected to identify manufacturing constraints early drive DFM and DFA into the product develop and qualify production processes and close the loop between engineering intent and what happens on the factory floor. The ideal candidate is equally comfortable reviewing a CAD model with a design engineer developing a fixture or manufacturing process troubleshooting a build issue working with a supplier and using production data to improve the next iteration of the product.

This is a hands-on engineering role with significant influence over how Kaleidos evolves from a development program into a manufacturable product.

• Own manufacturing and inspection processes for critical Kaleidos components mechanisms structures and assemblies from design release through fabrication integration and final acceptance.

• Partner closely with design engineers to drive design for manufacturability and assembly (DFM/DFA) influencing hardware to reduce mass part count manufacturing complexity assembly time and production risk.

• Evaluate designs for manufacturability inspectability tolerance stack-up tooling access assembly sequence subsystem integration and final reactor assembly.

• Develop qualify document and continuously improve manufacturing processes for complex mechanical hardware and integrated assemblies.

• Translate engineering drawings CAD models requirements and specifications into manufacturing plans work instructions inspection strategies tooling requirements and production controls.

• Define fabrication and assembly approaches for new hardware including process selection sequencing make-versus-buy decisions and inspection methodology.

• Design and develop production tooling fixtures assembly aids lifting equipment and other manufacturing equipment required to safely and repeatably build reactor hardware.

• Partner with Quality and Test Engineering to establish inspection and acceptance strategies resolve build and test issues and incorporate lessons learned into future hardware and processes.

• Investigate manufacturing defects nonconformances and assembly issues using structured root-cause analysis and implement durable corrective actions.

• Identify evaluate and develop suppliers for critical components and manufacturing processes working directly with suppliers to mature fabrication methods and resolve technical issues.

• Identify and implement capital equipment machinery and production infrastructure needed to support current builds and future production volumes.

• Support hands-on build integration and troubleshooting activities while identifying opportunities to improve repeatability throughput yield labor content and production scalability.

• Bachelors degree in mechanical engineering manufacturing engineering aerospace engineering or a related technical discipline from an accredited institution.

• 8 years of experience manufacturing complex mechanical hardware in a production development or high-reliability engineering environment.

• Demonstrated experience partnering with design engineering to influence hardware through DFM/DFA.

• Experience owning manufacturing processes from development through qualification and production implementation.

• Strong understanding of mechanical fabrication and assembly processes including machining joining fastening alignment tolerance control and inspection.

• Strong ability to interpret engineering drawings CAD models specifications and Geometric Dimensioning & Tolerancing (GD&T).

• Experience developing manufacturing documentation such as work instructions process specifications routings and inspection plans.

• Experience troubleshooting manufacturing and assembly problems performing root-cause analysis and implementing corrective actions.

• Demonstrated ability to make practical engineering tradeoffs across manufacturability quality cost schedule performance and risk.

• Experience working directly with technicians machinists fabricators inspectors and operators in a hands-on manufacturing environment.

• Strong written and verbal communication skills and the ability to work effectively across design quality test supply chain and operations teams.

• Masters degree in mechanical engineering manufacturing engineering or a related technical discipline.

• Experience transitioning complex hardware from prototype or development builds into repeatable or scaled production.

• Experience manufacturing highly engineered hardware in aerospace energy nuclear automotive defense turbomachinery or another high-reliability industry.

• Experience with precision machining mechanical joining dimensional inspection and non-destructive evaluation methods.

• Experience with tolerance analysis and manufacturing or assembly strategies for tightly controlled interfaces.

• Experience designing custom fixtures tooling assembly equipment or other production hardware.

• Experience with process qualification first article inspection statistical process control or production quality systems.

• Experience developing suppliers for low-volume high-complexity hardware.

• Experience with manufacturing automation production equipment or semi-automated assembly systems.

• Demonstrated ability to reduce part count mass assembly time production complexity or manufacturing cost without compromising product performance.

• Must be willing to support extended hours and weekends when necessary to meet critical program milestones.

• Must work 100% onsite at Radiants El Segundo headquarters.

• 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:

Staff IC