Senior Nuclear Engineer

About the Role

Radiant is seeking a driven Senior Nuclear Engineer to join our team! You will own modeling methods and reactor physics calculations of neutronics parameters such as reactivity, kinetics parameters, and energy deposition distributions used within our cutting-edge custom-made Digital Twin simulation software. You’ll be responsible for assessing conservatism and verifying assumptions within the modeling methods and documenting all results. Because these methods are pivotal in the safety analysis, you will play a key role in the commercialization of the first mass-produced nuclear reactor.

Responsibilities

• Own modeling methods of core neutronics and reactor physics calculations supporting Radiant’s transient safety analyses.
• Perform calculations of energy deposition distributions, reactivity coefficients, kinetics parameters, and control blade worths to input into Digital Twin models.
• Verify assumptions and assess conservatism of neutronics models.
• Document methods for both technical and non-technical audiences.
• Assist in Verification & Validation (V&V) efforts for the Digital Twin.
• Review and support other nuclear analyses across the company in reactor physics, shielding, and radiation detection.

Requirements

• Bachelor’s degree in nuclear engineering or a similar field from an accredited institution.
• 4+ years of experience with Monte Carlo nuclear engineering software such as OpenMC, MCNP, Serpent, SCALE, etc.
• Experience documenting analysis methods and assumptions.
• Strong programming skills in any language, preferably Python.

Qualifications

• Knowledge and experience in reactor kinetics.
• Basic knowledge of thermal hydraulic principles.
• Experience communicating and distilling information with cross-functional teams.
• Driven, self-motivated, and takes ownership of work end to end.

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.

Benefits

• 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 Benefits: Life, accident, hospital, critical illness, commuter, and FSA/HSA options.
• Parental Leave: 8 weeks paid for all parents, additional paid pregnancy leave for CA employees.
• Meals & Snacks: Daily catered lunch, free snacks and drinks.
• Time Off: Flexible PTO policy, remote workday allocation.
• Culture: Company events, happy hours, and team-building activities.
• Location: Beautiful El Segundo headquarters near the Pacific Ocean.

Compensation

$133.5K – $184.8K

Total Compensation and Benefits

Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s 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.