New Graduate Thermal Engineer

About the role

Radiant is a startup developing portable nuclear microreactors and is looking for a highly motivated new graduate Thermal Engineer to support the design and performance evaluation of its Kaleidos system.

Key responsibilities

• Develop and execute thermal analysis and CFD to evaluate design and performance of Kaleidos systems.
• Document analysis results to communicate clear and actionable outputs.
• Expand CFD capabilities, accuracy, and efficiencies via methods and workflow development projects.
• Own pipeline for producing analysis geometry from mechanical design CAD.
• Develop methods and calculations to support and build confidence in lower‑fidelity thermal analysis methods.

Required profile

• BS or MS in Chemical, Mechanical, Aerospace Engineering or related discipline, graduating Dec 2026 or Spring 2027.
• High level of independence in solving challenging engineering tasks.
• Proactive in seeking resources and asking questions to complete projects accurately and timely.
• Ability to thrive in a fast‑paced startup environment with a collaborative attitude.
• Genuine excitement for deploying nuclear microreactors to remote locations.

Required skills

• Thermal analysis
• Computational Fluid Dynamics (CFD)
• Mechanical design CAD
• Lower‑fidelity thermal analysis methods

What we offer

• Substantial incentive stock plan for all full‑time employees.
• Comprehensive medical, vision, dental, and life benefits with high employer contributions.
• 8‑weeks paid parental leave and additional paid pregnancy leave for CA employees.
• Daily catered lunch, free snacks and drinks, and flexible PTO.
• Remote workday allocation and hybrid work options.