Early-Career Mechanical Engineer, Nuclear Microreactors

Radiant industries; El Segundo (CA); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Stock plan

Medical plan

One Medical

Vision plan

Dental plan

Voluntary benefits

Parental leave

Lunch & Snacks

Flexible PTO

HQ near Pacific Ocean

Job summary

Radiant is an El Segundo, CA-based startup creating portable nuclear microreactors. The company seeks graduates to contribute to design, analysis, and testing of the Kaleidos project, taking ownership from concept through build and validation under guidance from senior engineers.

Ideal candidates will have a BS/MS in mechanical or aerospace engineering, strong fundamentals in thermodynamics and dynamics, hands-on project experience, and proficiency with CAD and analysis tools.

Qualifications

• BS or MS in Mechanical or Aerospace Engineering; December 2026 or Spring 2027 graduation is expected.
• Strong foundation in engineering first principles, including thermodynamics, fluid mechanics, statics, dynamics, and strength of materials.
• Hands-on design and build experience via projects, research, labs, or internships.
• Proficiency with engineering tools such as CAD, analysis software, and lab instrumentation.

Responsibilities

• Contribute to the design, analysis, and testing of our microreactor.
• Take ownership of deliverables from concept through build and validation, with guidance from senior engineers.
• Collaborate across disciplines to integrate designs and resolve technical challenges.
• Support system-level testing, troubleshooting, and design iteration to accelerate KDU development.
• Communicate results through design reviews, technical reports, and presentations to peers and leadership.

Skills

Engineering fundamentals

CAD

Analysis software

Lab instrumentation

Education

BS or MS in Mechanical Engineering or Aerospace Engineering

Tools

CAD

Analysis software

Lab instrumentation

Job description

Radiant is an El Segundo, CA-based startup creating portable nuclear microreactors. The company seeks graduates to contribute to design, analysis, and testing of the Kaleidos project, taking ownership from concept through build and validation under guidance from senior engineers.

Ideal candidates will have a BS/MS in mechanical or aerospace engineering, strong fundamentals in thermodynamics and dynamics, hands-on project experience, and proficiency with CAD and analysis tools.