Senior Test Engineer, Mechanical/Fluids

El Segundo, CAfull time

Remote

senior

$134k–$185k

H1B: no

Radiant Industries Senior Test Engineer at Radiant Industries leads test operations for nuclear microreactor technology focusing on fluid and mechanical systems. The role involves test planning, execution, risk mitigation, hardware integration, and data analysis in a fast-paced production environment.

Responsibilities

Test Strategy, Planning & Technical Ownership
Own and lead the test strategy across development, qualification, and production acceptance phases.
Define test objectives, plans, success criteria, 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
Serve as Test Conductor/Test Director, ensuring procedures reflect real-world execution.
Plan and execute fluid, mechanical, and thermal tests on Kaleidos hardware, from component level to full system development, qualification, and acceptance.
Partner with design engineers to develop test methods and fixtures for fluid, mechanical, and electrical hardware.
Integrate hardware into test setups: plumbing, instrumentation, data acquisition, and controls.
Author and maintain test procedures meeting DOE/NRC-aligned documentation standards, with strict formatting, clarity, and usability.

Qualification

Experience with high pressure gasesExperience designingKnowledge of instrumentationExperience with thermalExperience with DAQ

Required

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.

Preferred

Prior experience working in a fast-paced test environments (e.g., rocket engine testing, turbopump testing, component level testing), with familiarity in safety protocols, and high-reliability operations, high pressure gases, safety engineering (FMECAs, Keep-out Zone).
Experience in regulated or high-reliability environments (nuclear, aerospace, aviation, maritime).
Experience overseeing proof and leak testing, guiding technicians, and activating test skids/stands.
Experience with high pressure gases, pressure safety and stored energy.
Experience designing, fabricating, or operating fluid systems; ability to read P&IDs and drawings.
Knowledge of instrumentation: pressure transducers, flow meters, thermocouples, RTDs, accelerometers.
Experience with thermal, material, and mechanical test fixtures.
Experience with DAQ, PLCs, and analysis tools (e.g., Beckhoff, Python, MATLAB).