Senior Engineer Advanced Thermal Applications

Radiant seeks a driven Senior Thermal Analyst to lead thermal CFD analysis for the Kaleidos microreactor. You will design and execute simulations to ensure high fidelity reliability and safety across reactor systems. This role drives milestones toward commercialization of the first mass-produced nuclear reactor.

You will own thermal CFD analysis for the Kaleidos microreactor, a 1-megawatt portable nuclear reactor targeting rapid deployment. You will use STAR-CCM+ and Ansys Fluent to model turbulent flow, heat transfer, and multi-physics interactions, ensuring high fidelity and safety across reactor systems. Working with cross-functional teams in El Segundo, you will drive simulation workflows and reduced-order methods to accelerate commercialization. This role stands out for its direct impact on the first mass-produced microreactor, with a path to test at Idaho National Laboratory.

Radiant seeks a Senior Nuclear Thermal-Hydraulics Engineer to lead thermal-hydraulics and coupled physics analysis for the Kaleidos microreactor. Own analysis that determines how heat coolant and reactor core behavior interact under normal and accident conditions. This role applies reactor-specific thermal-hydraulics experience to a fast-moving factory-built reactor program. It differs from generic positions by focusing on real-world deployment and licensing support.

We seek a Senior Mechanical Engineer with PE license leading mechanical/HVAC design for mission critical facilities like data centers. This fully remote role offers competitive salary and benefits. The ideal candidate drives full project lifecycles from concept to construction administration while meeting high availability standards.

Lead thermal solution ownership for high speed vehicles at Hermeus. Analyze design implement and validate thermal systems for Mach3+ flight. Drive integration across disciplines and innovate thermal efficiency.

We seek a Senior Aerodynamics/CFD Engineer for our Boulder Colorado location. This role offers remote flexibility with travel. The position involves designing loft and optimizing components affecting aircraft aerodynamics and outer mold line. You will build models clean CAD geometry and generate meshes for CFD simulations that inform trade studies and certification decisions. You will support aerodynamic design across all phases develop high-fidelity databases for performance prediction and execute post-processing analysis for stakeholders. Collaboration with cross-functional teams ensures model accuracy and provides CFD expertise. You will improve software methods and support verification validation activities including failure hazard assessments. Training and mentorship of junior engineers are required.