Senior Nuclear Engineer, Microreactor Design & Analysis

Radiant, Inc.; El Segundo (CA); On-site; USD 170,000 - 230,000; Full time

Benefits offered by this job

Stock plan

Comprehensive health benefits

One Medical memberships

Vision coverage

Dental coverage

Parental leave

Job summary

Radiant in El Segundo, CA seeks a Staff Nuclear Engineer to lead nuclear design and analysis across core physics, shielding, dose, and regulatory work. You will own projects from requirements through validation, mentor engineers, and collaborate with reactor systems, safety, and regulatory teams.

Ideal candidates bring deep judgment, strong fundamentals, and the ability to translate complex analyses into practical reactor design decisions, with high autonomy.

Qualifications

• Bachelor’s degree in nuclear engineering from an accredited institution.
• 8+ years of nuclear engineering experience across reactor design, analysis, testing, licensing, safety, or operations.

Responsibilities

• Provide technical leadership across reactor physics, core performance, shielding, dose and activation, thermal-hydraulics, safety analysis, I&C, and reactor operations.
• Own complex nuclear engineering projects from requirements capture and design iteration through model development, analysis, technical review, and final documentation.

Skills

Nuclear engineering

Neutron transport

Monte Carlo

Regulatory analysis

Technical leadership

Mentoring

Communication

Cross-disciplinary

Project ownership

Independent problem solving

Education

Bachelor’s degree in nuclear engineering

Tools

MCNP

OpenMC

Python

Job description

Radiant in El Segundo, CA seeks a Staff Nuclear Engineer to lead nuclear design and analysis across core physics, shielding, dose, and regulatory work. You will own projects from requirements through validation, mentor engineers, and collaborate with reactor systems, safety, and regulatory teams.

Ideal candidates bring deep judgment, strong fundamentals, and the ability to translate complex analyses into practical reactor design decisions, with high autonomy.