Senior Electrical Engineer, Controls

Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. The U.S. grid is under growing strain, with power demand accelerating, driving higher utility costs, rising carbon emissions, and interconnection backlogs. Radiant has a solution, transportable, on-site power. Our first reactor, Kaleidos, is 1 megawatt: small enough to be factory-built, transported by land, sea, or air, and deployed wherever power is needed. 1 MW can power 1000 homes for five years. Ship it back and we refuel for a 20 year operating life. We made energy a product that can be used for critical infrastructure like military bases, data centers, hospitals, and remote sites, as well as the commercial main street businesses that keep America running. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force and has signed pre-order agreements with Equinix, with deployments beginning in 2028.

Radiant is seeking an Senior Electrical Engineer, Controls to support the design, build, and integration of electrical controls systems in a fast-paced startup environment. You’ll work alongside experienced mechanical and electrical engineers to solve challenging problems in system architecture, power distribution, packaging, and system integration for advanced hardware. This role offers hands-on exposure to end-to-end hardware development from CAD and analysis through build, test, and validation.

• Own the electrical system design from concept through integration, and serve as the subject matter expert on power distribution, control electronics, and safety electronics.

• Design and develop industrial electrical control systems including schematics, wiring diagrams, harnessing, and integration assemblies.

• Lead design of fault-tolerant and safety-critical electrical systems, emphasizing reliability, maintainability, and regulatory compliance.

• Develop and review electrical interface designs between control systems, power equipment, and instrumentation.

• Create and maintain system power budgets, conduit schedules, panel schedules, and cable schedules.

• Perform SCCR, Arc Flash, and other system-level calculations.

• Ensure designs comply with applicable electrical codes and safety standards, including NFPA, NEC, and IEEE requirements.

• Support technicians with electrical build and integration as the system owner.

• Work with the electrical team to commission the system and troubleshoot issues across the reactor.

• Provide nonconformance solutions throughout the build and integration phases of development to limit program delays and maximize system uptime.

• Bachelor’s degree in electrical engineering or related field.

• 5+ years of experience designing electrical hardware.

• Experience designing fault-tolerant and safety-critical hardware.

• Experience with Ethernet, EtherCAT, Modbus, CANbus, RS-422, or other communications protocols.

• Experience selecting, integrating, and troubleshooting sensors including pressure transducers, RTDs, thermocouples, shaft speed and position sensors, IEPE vibration sensors, and MEMS-based sensors.

• Experience using electrical design software such as AutoCAD Electrical, Zuken E3 Cable, or similar schematic and wiring design tools.

• Experience designing, analyzing, and working safely with industrial power systems, including 120 VAC, 208 VAC, and 480 VAC equipment, and applying applicable electrical safety practices.

• Strong electrical engineering fundamentals.

• Experience specifying and integrating Variable Frequency Drives (VFDs), soft starters, and motor control centers (MCCs).

• Experience in electrical architecture make vs. buy trades.

• Experience with Siemens NX.

• Experience with PLCs, Twincat, structured text programming.

• Familiarity with EMI/EMC mitigation techniques and testing.

• Experience with Python, C/C++, or scripting languages for test automation, data acquisition, or diagnostics.

• Experience supporting nuclear instrumentation systems.

• Experience with FMEAs and hazard analysis.

• Experience with industrial network architecture and deterministic control networks.

• Must be willing to work extended hours and weekends as necessary to accomplish our mission.

• Must work 100% onsite at El Segundo HQ.

• 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.

• Nuclear Engineering Certificate Program: 100% covered educational program with Penn State University, for eligible employees, to rapidly upscale into nuclear.

• 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. Radiant’s full-time 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 today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: [email protected].
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 applicant’s capacity to serve in compliance with U.S. export controls.