Nuclear Test Engineer: Systems & Test Conductor

Speedrun Talent Network; El Segundo (CA); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

Stock incentive plan

Medical plan

One Medical

Vision plan

Dental plan

Parental leave

Nuclear certificate program

Daily catered lunch

Flexible PTO

Onsite HQ in El Segundo

Job summary

Radiant is an El Segundo, CA-based company developing transportable nuclear microreactors. We seek a Test Engineer to drive test operations for development, qualification, and acceptance of our nuclear technology, with a focus on fluid and mechanical systems.

You will bridge engineering, operations, and human factors, translating complex hardware and software designs into executable test procedures and campaigns.

Qualifications

• 2+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing.
• Bachelor’s degree from an accredited institution in mechanical, manufacturing, or other related engineering discipline.
• Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations.
• Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime).
• Demonstrated ability to lead projects and work independently.
• Strong technical fundamentals in fluids and thermodynamics.
• Strong written and verbal communication skills.
• Flexible and adaptable mindset - self-driven with the ability to seek out requirements with minimal direction.

Responsibilities

• Perform testing as a Test Conductor/Test Director to gain firsthand experience, ensuring procedures align with real-world execution.
• Partner with design engineers to develop innovative test methods for complex mechanisms and structures.
• Support testing and iterative improvements of fluid, electrical, and structural hardware of the Kaleidos reactor through development, qualification, and acceptance testing.
• Identify and develop appropriate suppliers for component sourcing and fabrication.
• Drive initiatives for continuous improvement in test processes and data delivery quality.
• Support one-off test campaigns in a fast paced, minimum-requirements environment to drive hardware risk reduction.
• Ensure compliance with DOE and NRC standards, maintaining strict formatting, clarity, and usability in procedural documentation.

Skills

Problem solving

First principles

Regulated industries

Project leadership

Fluids thermodynamics

Communication

Education

Mechanical engineering

Manufacturing engineering

Tools

Beckhoff

Python

MATLAB

NX CAD

Teamcenter

Ion

Epsilon3

Job description

Radiant is an El Segundo, CA-based company developing transportable nuclear microreactors. We seek a Test Engineer to drive test operations for development, qualification, and acceptance of our nuclear technology, with a focus on fluid and mechanical systems.

You will bridge engineering, operations, and human factors, translating complex hardware and software designs into executable test procedures and campaigns.