Staff Nuclear Systems Engineer — Systems Integration Leader

Radiant; El Segundo (CA); On-site; USD 180,000 - 240,000; Full time

Benefits offered by this job

Stock plan

Medical coverage

Dental/Vision coverage

Parental leave (8 weeks)

Job summary

Radiant in El Segundo, CA is seeking a Staff Reactor Systems Engineer to own the technical integration of Kaleidos, a first-of-a-kind nuclear microreactor.

You will translate top-level product and safety requirements into subsystem specs, own interfaces, and ensure the integrated system performs, is safe, and can be built, tested, and deployed on time across multiple disciplines. You will shape systems engineering practices as Kaleidos scales to production and help unlock commercialization.

Qualifications

• Bachelor’s degree in engineering, physics, or a related technical discipline.
• 10+ years of professional engineering experience in systems engineering, integration, testing, or technical leadership on complex hardware.
• Experience owning requirements and interfaces for a complex system from concept through build, test, and operation.
• Strong ability to lead system-level trade studies with incomplete information.

Responsibilities

• Own the Kaleidos system architecture and serve as technical authority for integrated system performance, safety, and reliability.
• Define and manage system budgets (thermal, mass, power, reactivity, volume) across subsystems.
• Own interface definitions and interface control documents between subsystems (core, loops, shielding, controls, structures).
• Maintain the technical baseline with lightweight processes suitable for a fast-moving startup.
• Identify cross-cutting risks early and drive resolution before safety or schedule issues arise.
• Define verification and validation strategy and collaborate with Test Engineering to create test plans and acceptance tests.
• Correlate analysis and test results with system requirements and resolve discrepancies.
• Support safety-basis and licensing documentation as needed.
• Mentor engineers in systems thinking and interface discipline.
• Communicate system status and tradeoffs clearly to leadership.

Skills

Systems engineering

Technical leadership

Requirements management

Interface management

Cross-disciplinary collaboration

Strong communication

Hazard analysis

Education

Bachelor’s degree in engineering

Job description

Radiant in El Segundo, CA is seeking a Staff Reactor Systems Engineer to own the technical integration of Kaleidos, a first-of-a-kind nuclear microreactor.

You will translate top-level product and safety requirements into subsystem specs, own interfaces, and ensure the integrated system performs, is safe, and can be built, tested, and deployed on time across multiple disciplines. You will shape systems engineering practices as Kaleidos scales to production and help unlock commercialization.