Internship - Mechanical Engineer (Fluid Systems...
@ Radiant

El Segundo, California, United States
On Site
Posted 9 days ago

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Job Details

Job Title: Internship - Mechanical Engineer (Fluid Systems, Mechanisms, or Structures)

Company Overview

Radiant is an El-Segundo, CA-based clean energy startup building a nuclear microreactor. A climate-friendly alternative to diesel generators, Radiant's Kaleidos 1MW microreactor will be the world's first portable, zero-emissions power source that works anywhere. We plan to test our development reactor by 2026 and if successful, it will be the first new commercial reactor design to achieve a fueled test in over 50 years.

Internship Overview

Radiant is seeking a highly motivated Mechanical Engineering Intern for Fall 2025. Under the KDU Engineering team, you will be responsible for a project tailored towards the finalization of the design, assembly, and testing of the Kaleidos Development Unit – the United States’ first new fueled reactor design in over 50 years.

You will be tasked with this project based on your skillset (fluid systems, mechanisms, or structures) and our organization’s priority. You’ll learn from a direct mentor, cross-functional teammates, and have a tangible impact on the readiness of KDU for fueled operations next year.

Responsibilities and Duties

  • Own all aspects of a project within a given discipline.
  • Deliver project on time with minimal supervision.
  • Present a final project review at the end of the internship.

Required Skills and Qualifications

  • Strong connection to engineering first principles expected.
  • Pursuing BS in mechanical engineering or related discipline.
  • Hands-on project examples outside of the classroom.

Desired Skills and Qualifications

  • Pursuing MS in mechanical engineering or related discipline.
  • Independence in solving challenging engineering tasks preferred.
  • Proactive and collaborative attitude in a startup environment.

Additional Requirements

  • Onsite work at El Segundo HQ required.
  • Occasional extended hours or weekends may be needed.

Employee Benefits for Eligible Employees

  • Stock options for full-time employees.
  • 100% medical coverage up to the base silver level.
  • Sponsored One Medical memberships.
  • Flexible PTO policy.
  • Free snacks and drinks onsite.
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How to Get Hired at Radiant

🎯 Tips for Getting Hired

  • Research Radiant's mission: Understand their focus on clean energy and nuclear microreactors.
  • Customize your resume: Highlight relevant projects and skills effectively.
  • Prepare for technical questions: Review thermodynamics and fluid mechanics fundamentals.
  • Network with Radiant’s employees: Connect on LinkedIn for insights and advice.

📝 Interview Preparation Advice

Technical Preparation

Review thermodynamics and fluid mechanics principles.
Familiarize with reactor physics basics.
Complete relevant hands-on projects in your field.
Practice engineering design presentation skills.

Behavioral Questions

Describe a time you worked independently on a project.
Explain how you handled challenges in a fast-paced environment.
Share an example of successful teamwork in a project.
Discuss your passion for clean energy initiatives.

Frequently Asked Questions