Onsite Nuclear Engineer – Microreactor Design & Safety

Radiant; El Segundo (CA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Stock plan

Medical benefits

One Medical membership

Vision plan

Dental plan

Paid parental leave

Education program

Daily catered lunch

Flexible PTO

Remote workday allocation

Job summary

Radiant, based in El Segundo, CA, seeks a highly motivated Nuclear Engineer to lead nuclear engineering initiatives for the Kaleidos microreactor. You will work with a tight-knit engineering team on shielding, neutronics, dose consequences, and transient analysis, driving design decisions in a startup environment.

The ideal candidate has a nuclear engineering degree and 1–2+ years of industry experience, with programming skills in Python, C++, C#, or FORTRAN, and familiarity with radiation

Qualifications

• Bachelor’s degree in nuclear engineering or equivalent from an accredited institution.
• 1–2+ years of nuclear engineering industry experience.
• Experience with radiation transport methods using MCNP/OpenMC/Serpent.
• Proficient in Python, C++, C#, FORTRAN, or similar scientific computing language.
• Basic knowledge of thermal-hydraulic principles.
• Strong organizational and written/oral communication skills.
• Experience in an engineering organization and delivering high-quality work.

Responsibilities

• Own nuclear design and analysis, including shielding, safety, and validation.
• Conduct neutronics analyses and verify reactor models (ex-vessel fluxes, energy deposition).
• Assess accident dose consequences for Kaleidos demonstrations and production units.
• Run transient analyses with coupled neutronics and thermal calculations.

Skills

Nuclear engineering

Radiation transport

Python

C++

C#

FORTRAN

Thermal hydraulics

Communication

Team collaboration

Education

Bachelor’s degree in nuclear engineering

Tools

MCNP

OpenMC

Serpent

Job description

Radiant, based in El Segundo, CA, seeks a highly motivated Nuclear Engineer to lead nuclear engineering initiatives for the Kaleidos microreactor. You will work with a tight-knit engineering team on shielding, neutronics, dose consequences, and transient analysis, driving design decisions in a startup environment.

The ideal candidate has a nuclear engineering degree and 1–2+ years of industry experience, with programming skills in Python, C++, C#, or FORTRAN, and familiarity with radiation