Mechanical Engineer (Electrical Systems)

Join Radiant, a fast-paced startup focused on deploying the first successfully fueled commercial reactor in over 50 years. As a Mechanical Engineer (Electrical Systems), you will support the design and integration of electrical components and subsystems, gaining hands-on experience in end-to-end hardware development. You will work alongside experienced engineers, contribute to challenging problems in packaging, thermal management, structural design, and system integration, and participate in system integration, troubleshooting, and validation activities.

• Support the mechanical design and ownership of electrical components and subsystems, including mechanical design of electrical assemblies, cable and wiring harness routing, and packaging of sensors.
• Conduct thermal analysis and heat-transfer assessments for electrical components, enclosures, and assemblies, and support selection of materials, fasteners, and finishes.
• Participate in system integration, troubleshooting, and validation activities alongside electrical and systems engineers, and develop, document, and execute basic test plans and procedures.
• Proficiency or coursework experience using Siemens NX or similar 3D CAD tools
• Ability to read and create mechanical drawings, including dimensions and tolerances
• Basic understanding of structural mechanics, load paths, and first-order stress calculations
• Familiarity with mechanical design of electrical assemblies, including enclosures, brackets, and harness routing principles
• Bachelor’s degree in Mechanical Engineering or a closely related field from an accredited institution
• Strong communication skills and ability to collaborate in a multidisciplinary engineering environment
• Introductory knowledge of thermal analysis, heat transfer, and thermal management concepts
• Hands-on experience with mechanical design through coursework, labs, internships, senior design projects, or engineering clubs
• Must be willing to work extended hours and weekends as necessary to accomplish our mission
• Must work 100% onsite at El Segundo HQ