Radiant is seeking a Principal Thermal-Hydraulics Engineer with deep expertise in CFD and thermal FEA to set the technical direction for thermal and fluid simulation of the Kaleidos microreactor. You will lead the most complex and consequential modeling problems for a high-temperature gas reactor, defining the methods, standards, and validation strategy that inform decisions across reactor systems, cooling systems, shielding, and more. As a recognized technical authority, you will mentor engineers, influence program-level decisions, and help drive the milestones that unlock commercialization of the first mass-produced nuclear reactor.

Serve as the technical authority for thermal CFD and thermal FEA modeling of Kaleidos reactor systems, owning the most complex and highest-risk analyses.

Define modeling strategy, methodology, and best practices for turbulent flow, heat transfer, and multi-physics interactions, and drive their adoption across the team.

Lead model verification and validation, correlating simulation results with test data and establishing confidence and uncertainty bounds for design and safety decisions.

Architect automated simulation workflows and tooling that expand capability, accuracy, and efficiency, and set the roadmap for simulation infrastructure.

Lead the development of reduced-order analysis methods in partnership with design, systems, and test teams.

Influence reactor, cooling, and shielding design decisions by translating analysis results into clear recommendations for engineering leadership.

Mentor and develop engineers, set the technical bar through design and analysis reviews, and contribute to hiring.

Collaborate across disciplines to define analysis requirements, align priorities, and resolve cross-team technical tradeoffs.

Principal Thermal-Hydraulics Engineer

Responsibilities

Qualification

Required

Preferred

Benefits

Company

Radiant Industries

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