Senior Structural Dynamics Engineer, Nuclear Microreactors

Radiant; El Segundo (CA); On-site; USD 120,000 - 170,000; Full time

Benefits offered by this job

Equity grants

Health benefits

Onsite lunch & snacks

Flexible PTO

Nuclear cert program

Job summary

Radiant in El Segundo, CA seeks a Stress Engineer to own structural loads, vibration, and dynamic analyses for Kaleidos, a portable nuclear microreactor platform. You will ensure structural integrity across manufacturing, transport, and operation, collaborating with structures, mechanical, thermal, nuclear, and test teams.

The role requires hands-on engineering in ambiguous, fast-paced environments with extensive on-site work at our El Segundo HQ, plus interactions with design teams for hardware

Qualifications

• BS in Mechanical/Aerospace/Structural Engineering or related field.
• 4+ years in stress, loads, dynamics, or structural analysis for complex mechanical systems.
• Strong fundamentals in structural mechanics, dynamics, and vibration.
• Experience with FEA tools (ANSYS/Abaqus/Nastran).
• Familiarity with design allowables, safety factors, and margin-of-safety methodologies.
• Ability to communicate analysis results to technical and non-technical stakeholders.

Responsibilities

• Develop static, dynamic, and transient loads for reactor systems and support structures.
• Perform structural dynamics analyses (modal, random vibration, shock, fatigue).
• Model nonlinear reactor response with explicit dynamics for transient events.
• Define transport environments and load cases for verification plans.
• Conduct FEAs using ANSYS/Abaqus/Nastran; collaborate on hardware design.
• Support test planning and data correlation; maintain analysis docs.
• Contribute to failure investigations and design improvements.

Skills

Structural mechanics

Dynamics & vibration

Communication

Cross-functional collaboration

FEA interpretation

Education

Bachelor’s degree in Mechanical/Aerospace/Structural Engineering

Tools

ANSYS

Abaqus

Nastran

LD-Dyna

Job description

Radiant in El Segundo, CA seeks a Stress Engineer to own structural loads, vibration, and dynamic analyses for Kaleidos, a portable nuclear microreactor platform. You will ensure structural integrity across manufacturing, transport, and operation, collaborating with structures, mechanical, thermal, nuclear, and test teams.

The role requires hands-on engineering in ambiguous, fast-paced environments with extensive on-site work at our El Segundo HQ, plus interactions with design teams for hardware