The Mechanical Engineer II – Nuclear Systems will support the analysis, design, and structural integrity assessment of mechanical components (heat exchangers, condensers, tanks, etc.) and reactor internals for advanced reactors including SMRs. This role combines technical expertise in stress analysis, fracture mechanics, fatigue evaluation, and regulatory compliance with a proven background in multidisciplinary project execution.
Location: Madrid, Spain
Primary Responsibilities Perform mechanical design and stress analysis for ASME Section III Class 1, 2, and 3 components and supports
Conduct detailed stress analysis using industry tools (ANSYS, LS-DYNA, MATLAB, Mathcad)
Perform fracture mechanics and fatigue life evaluations of metal structures
Ensure compliance with nuclear codes and standards (ASME BPVC II/III/XI, ANSI/AISC N690, ANSI N14.6)
Develop and review engineering deliverables including stress reports, design calculations, and fitness-for-service evaluations
Review vendor reports for technical acceptance and regulatory/contract compliance
Support fabrication, construction, and field issue resolution
Respond to regulator requests for information in support of licensing activities




Mentor engineers and provide technical leadership to other team members Requirements Bachelor’s degree in Mechanical, Structural, or Aerospace Engineering (MSE preferred)
Eligibility to work under 10 CFR Part 810
5-7 years of experience in mechanical design analysis and component integrity
Knowledge of material degradation mechanisms including brittle fracture and fatigue
Experience with numerical modeling and simulation tools such as ANSYS, LS-DYNA, Solidworks
Strong technical writing, communication, and collaboration skills Preferred Qualifications Professional Engineer (P. Eng. or PE) license
Experience with PWR or SMR reactor systems
Familiarity with ASME Section III Class 1, 2, 3 component design and analysis
Familiarity with nuclear regulatory requirements (10 CFR50, NUREG-0800)
Experience with seismic design and analysis of equipment 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.
#J-18808-Ljbffr

📌 Mechanical Engineer Ii - Nuclear Systems (Madrid)
🏢 Holtec International
📍 Madrid