CFD Engineer Specialist

The CFD Engineer Specialist will support engineering and licensing requirements, leading to the licensing and construction of the first SMR-300 plant. The engineer will use, and have the opportunity to learn, various methods and software to perform the analyses. The Engineer will be part of a team executing a U.S. Government cost-shared development program requiring the efficient completion of engineering assignments, including coordination with other engineers in U.S. and offshore operating centers.

Location: Madrid, ES (On-site)

Primary Responsibilities:

• Develop new and innovative Computational Fluid Dynamics (CFD) simulations related to nuclear power plant components.
• Collaborate in small teams focused on the development and execution of complex multi-physics flow simulations, including conjugate heat transfer.
• Apply developed and developing capabilities to directly impact design processes and minimize the need for hardware testing.
• Provide actionable component-level and/or system-level design recommendations to Design Responsible Engineers by interpreting complex analysis results.
• Participate in product design and development teams, presenting analysis results to engineering peers and management.
• Enhance concept designs based on limited requirements or functions and develop mature requirements by gaining an understanding of the system, structure, or components.
• Transform concept designs into license ready designs through critical thinking, literature research, collaboration with team members from other disciplines and vendors, and any analysis permitted by project milestones.
• Support the preparation of design deliverables, presentations, and communicate design progress in stakeholder meetings.
• Author and review technical reports, calculation packages, and licensing documentation in compliance with NQA-1 and NRC regulatory frameworks (e.g., RG 1.203) to support the reactor's Preliminary and Final Safety Analysis Reports (PSAR/FSAR).

Requirements:

• Advanced degree in Mechanical or Nuclear Engineering with a focus on thermal-hydraulic analysis and design

• 5+ years of experience in CFD and thermal-hydraulics
• Proficient in ANSYS (Fluent, CFX, Workbench), STAR-CCM+, meshing tools, and SpaceClaim
• Strong knowledge of heat transfer, fluid dynamics, and CFD turbulence models
• Familiarity with two-phase flow modeling
• Programming skills in Python, C++, or Java for automation and post-processing
• Excellent analytical, problem-solving, and computer skills
• Strong technical writing, communication, and organizational abilities
• Detail-oriented with a focus on accuracy and error-free work
• Eligible to work under 10 CFR Part 810
• MS or PhD in Mechanical Engineering, applied mechanics, or closely related field of engineering (preferred).
• Industry experience using CFD simulation to support product development.
• Experience working with engineers and fabricators to develop designs and drawings.
• Experience with SolidWorks, AutoCAD, and ANSYS software.
• Knowledge of ASME Section III compliance and NRC regulatory frameworks for code validation is a major plus.
• Experience working in the nuclear industry.

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If you’re driven to solve meaningful challenges and make a lasting impact, we invite you to build your career at Holtec—a generation ahead by design™.