Senior Advanced Controls Systems Engineer

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 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. Radiants 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.

Senior Advanced Controls Systems Engineer

Radiant is seeking a Senior Advanced Controls Systems Engineer to lead the design implementation and validation of autonomous control systems for nuclear this role you will own control system development end-to-endfrom requirements definition through operational deploymentincluding algorithm development modeling and simulation embedded implementation and system validation.

You will design and integrate tightly coupled control functions spanning reactivity control primary loop mass flow alternator/generator speed and multi-reactor coordination on microgrids. The ideal candidate is comfortable working within regulatory environments developing autonomous and adaptive control strategies and performing system-level analysis of nonlinear coupled dynamic systems. This role requires close collaboration with multidisciplinary engineering teams responsible for hardware software and system integration.

Responsibilities & Duties

• Serve as Responsible Engineer with full technical ownership of Kaleidos control systems including generator supervisory and plant-level controls.
• Design and implement subsystem control architectures including Reactor reactivity control mechanisms Electrical power conversion and grid interface controls Generator and alternator speed control (FOC SVM)
• Develop control algorithms embedded software and analytic models to derive and flow down requirements to components and subsystems.
• Perform system-level modeling and analysis of coupled linear and nonlinear dynamics.
• Lead control system prototyping simulation hardware testing validation and verification activities.
• Develop and execute methods for analyzing control system performance robustness and stability.
• Review and analyze test data to validate control performance and inform design iteration.
• Author technical documentation and support regulatory review and licensing of control systems.
• Collaborate closely with mechanical electrical nuclear and software engineering teams to ensure successful system integration.

Required Qualifications & Skills

• Bachelors and masters degree or higher in Electrical Engineering Mechanical Engineering Physics Nuclear Engineering or a related discipline.
• 10 years of experience in dynamic system modeling control algorithm development simulation testing and auto-code generation using MATLAB/Simulink including deployment to embedded targets.
• 5 years of experience designing implementing and calibrating controllers for linear and nonlinear dynamic systems.
• Deep expertise in classical control theory including:Stability analysisOn/off and PID controlSliding mode controlMultivariable controlGain schedulingReference tracking bandwidth design controllability and observability analysis
• Strong expertise in advanced and nonlinear control including Nonlinear system modeling and stability analysis (Lyapunov methods)Optimal control (LQR LQG MPC)Adaptive control (MRAC STR)Robust control methods
• Hands-on experience designing controllers and observers for stochastic systems.
• Hands-on experience designing observers and estimators for linear and nonlinear systems.
• Experience modeling simulating and testing complex coupled dynamic systems.
• Expertise in Monte Carlo analysis uncertainty quantification and system identification.
• Familiarity with industrial and embedded communication protocols including EtherNet/IP EtherCAT CANOpen Ethernet and RS-422/485.

Desired Qualifications & Skills

• PhD in Electrical Engineering Mechanical Engineering Physics Nuclear Engineering or a related discipline.
• 8 years of experience in control systems engineering.
• Hands-on experience designing nonlinear control systems for autonomous platforms including GNC systems autonomous driving or robotics.
• Experience with autonomous system diagnostics including fault detection isolation and recovery (FDIR).
• Experience with permanent magnet synchronous motor control including FOC VSM and sensorless techniques.
• Experience with turbomachinery control including turbines or jet engines.
• Experience with microgrid control and multi-source power systems.

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 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: .

Benefits and Perks for Eligible Employees:

• Stock: Substantial incentive stock plan for all full-time employees.
• Medical: 100% premium coverage for base Silver level plan for employee 50% premium coverage for dependents. Platinum plans available.
• One Medical: Sponsored memberships for eligible employees and their dependents.
• Vision: 100% premium coverage for top tier plan 50% for dependents.
• Dental: 100% premium coverage for top tier plan (including orthodontia) 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 applicants capacity to serve in compliance with U.S. export controls.