Senior Test Engineer: Nuclear Systems & Test Director

Speedrun Talent Network; El Segundo (CA); On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Stock options

Medical benefits

One Medical memberships

Vision coverage

Dental coverage

Parental leave

Educational program with Penn State

Lunch provided

Flexible PTO

Onsite HQ

Job summary

Radiant in El Segundo, CA seeks a Senior Test Engineer to drive test operations for nuclear microreactor tech, bridging engineering, operations and human factors. You will translate complex hardware and software designs into executable tests, with risk-based planning and rigorous data analysis.

You will collaborate across disciplines to plan, execute, and optimize fluid, mechanical, and thermal tests, contributing to safety, reliability, and rapid iteration in a fast-paced production environment.

Qualifications

• 5+ 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

• Test Strategy, Planning & Technical Ownership
• Define test objectives, plans, instrumentation strategies, and data requirements for hardware and systems.
• Serve as the technical authority for test methods, measurement quality, and data integrity.
• Translate analytical predictions and design requirements into targeted test campaigns that validate assumptions and retire risk.
• Balance test coverage, technical risk, schedule, and hardware availability to enable rapid iteration while maintaining safety and rigor.
• Test Execution & Data Analysis: Plan and execute tests, analyze data, and support root cause investigations.
• Partner with design engineers to develop test methods and fixtures for fluid, mechanical, and electrical hardware.
• Integrate hardware into test setups and author/test procedures aligned with DOE/NRC standards.

Skills

Engineering experience

System design

Analysis

Testing

Regulated industries

Leadership

Communication skills

Education

Bachelor's degree

Tools

Beckhoff

Python

MATLAB

NX CAD

Teamcenter

Epsilon3

Ion

Job description

Radiant in El Segundo, CA seeks a Senior Test Engineer to drive test operations for nuclear microreactor tech, bridging engineering, operations and human factors. You will translate complex hardware and software designs into executable tests, with risk-based planning and rigorous data analysis.

You will collaborate across disciplines to plan, execute, and optimize fluid, mechanical, and thermal tests, contributing to safety, reliability, and rapid iteration in a fast-paced production environment.