CFD Engineer Specialist

Holtec International

Madrid, ESonsite$95k-$115k/yrPosted Jun 16, 2026
Posting intelligenceActively listedReposted 5×, possible evergreen/ghost posting

Skills

pythonc++javago

About the role

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: Camden, NJ (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.

A Generation Ahead by Design™

Investing in people who power the future.

We believe great work deserves great rewards. Our benefits go beyond the basics, reflecting our commitment to supporting your whole self…your health, your future, and your career growth. This includes:

Compensation:

Annual compensation based on skills and experience ranging from $95,000 to $115,000

Benefits:

Industry‑leading medical, dental, and vision coverage with a generous employer premium contribution and Day 1 eligibility!

FLEX Program – Hybrid work opportunities available for eligible roles, where business needs and role requirements allow

401(k) retirement plan with up to a 5% company match and immediate vesting to support long‑term financial security

Paid time off and 11 paid holidays to support rest, balance, and recharge

Wellness program offering rewards for participation in company‑supported health initiatives

Commuter benefits supporting mass transit and commuter parking options

Company‑paid life and AD&D insurance for added peace of mind

Education assistance to support continued education and professional growth

Employee support and voluntary benefits, including an Employee Assistance Program and optional coverage such as disability, legal, identity theft, and insurance programs

Benefits eligibility and offerings may vary based on role, location, and employment status

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™.

Compensation

This Software Engineer role pays $95k-$115k/yr. Within typical range for software engineer roles in Spain.

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