Join Radiant as a Senior Nuclear Engineer to lead modeling methods and reactor physics calculations for innovative nuclear microreactors.
Posted by employer 2 months ago
First seen on Joblaze 2 months ago
Last verified on the company career page 16 hours ago
Skills & Technologies
Requirements
- Experience
- 4+ years
- Education
- Bachelor's degree
Not disclosed in this posting: compensation, visa sponsorship.
Benefits
Joblaze summary
In this role, the Senior Nuclear Engineer at Radiant focuses on developing and validating modeling methods for reactor physics calculations, which are essential for safety analyses of their innovative microreactors. Proficiency in Monte Carlo nuclear engineering software and strong programming skills, particularly in Python, are crucial for success. This position is ideal for experienced professionals with a background in nuclear engineering who are driven and self-motivated. Radiant, a startup on the cutting edge of portable nuclear technology, emphasizes a collaborative environment and rapid development.
Joblaze insights
- Listed about 2 months ago — first seen on Joblaze September 3, 2026. Last confirmed on Radiant's careers page November 2, 2026.
- Python appears in 16.5% of 2613 comparable senior other roles in United States.
Quick facts
- Is the Senior Nuclear Engineer role remote?
- No — this is an on-site role in El Segundo, CA.
- How much experience is required?
- At least 4 years of relevant experience for this Senior Nuclear Engineer role.
- Where is the role based?
- Radiant is hiring for this position in El Segundo, CA.
- What's the tech stack?
- Joblaze extracted these technologies from the posting: Monte Carlo, Python.
- What seniority level is this role?
- Radiant targets senior candidates for this position.
- Is this full-time or contract?
- Full-time for this Senior Nuclear Engineer role at Radiant.
From the original posting
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 & Duties:
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.
Required Qualifications & Skills:
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.
Desired Qualifications & Skills:
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.
Benefits and Perks
Stock: Substantial incentive stock plan for all full-time employees.
Daily catered lunch. Free snacks and drinks.
Flexible PTO policy. Remote workday allocation.
Standard company text repeated across Radiant's postings is omitted here.