Senior Mechanical Engineer - Mechanisms for Nuclear Systems

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

Benefits offered by this job

Stock options

Medical plan

One Medical

Vision coverage

Dental coverage

Voluntary benefits

Parental leave

Education program

Free meals & snacks

Flexible PTO

Team events

HQ near Pacific

Job summary

Radiant seeks a Senior Mechanical Engineer, Mechanisms in El Segundo, CA, to design and develop mechanisms within Kaleidos. You will handle trade studies, material selection, analyses, and BOM management to enable safe, reliable actuation of critical safety features and reactivity controls.

You will perform thermomechanical analyses, create assembly instructions, coordinate with suppliers, and own risk analysis for subsystems while collaborating with cross‑functional teams to deliver a new

Qualifications

• Bachelor’s degree in Mechanical or Aeronautical Engineering.
• 4+ years of experience designing mechanisms.
• 4+ years of experience performing stress analysis using hand calculations and finite element tools (Abaqus, Ansys, FEMAP, or similar).

Responsibilities

• Ownership of critical mechanisms such as the control blade actuator or air jacket valves.
• Conduct trade studies and develop designs to meet program requirements.
• Perform detailed thermomechanical analysis (static strength, durability/fatigue) and kinematic analysis to determine structural integrity and performance margins using both hand calculations and finite element tools.
• Develop and execute manufacturing/assembly instructions and test plans.
• Create and manage a Bill-Of-Materials (BOM).
• Find and develop suppliers for components.
• Own subassembly design, manufacturing, and test schedules.
• Own risk analysis (FMEA) for subsystems.
• Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication.

Skills

Mechanical design

Stress analysis

GD&T

Engineering documentation

Education

Bachelor’s degree in Mechanical or Aeronautical Engineering

Tools

NX CAD

Abaqus

Ansys

FEMAP

Job description

Radiant seeks a Senior Mechanical Engineer, Mechanisms in El Segundo, CA, to design and develop mechanisms within Kaleidos. You will handle trade studies, material selection, analyses, and BOM management to enable safe, reliable actuation of critical safety features and reactivity controls.

You will perform thermomechanical analyses, create assembly instructions, coordinate with suppliers, and own risk analysis for subsystems while collaborating with cross‑functional teams to deliver a new