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, SpainPrimary ResponsibilitiesPerform mechanical design and stress analysis for ASME Section III Class 1, 2, and 3 components and supportsConduct detailed stress analysis using industry tools (ANSYS, LS-DYNA, MATLAB, Mathcad)Perform fracture mechanics and fatigue life evaluations of metal structuresEnsure 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 evaluationsReview vendor reports for technical acceptance and regulatory/contract complianceSupport fabrication, construction,



and field issue resolutionRespond to regulator requests for information in support of licensing activitiesMentor engineers and provide technical leadership to other team membersRequirementsBachelor’s degree in Mechanical, Structural, or Aerospace Engineering (MSE preferred)Eligibility to work under 10 CFR Part 8105-7 years of experience in mechanical design analysis and component integrityKnowledge of material degradation mechanisms including brittle fracture and fatigueExperience with numerical modeling and simulation tools such as ANSYS, LS-DYNA, SolidworksStrong technical writing, communication, and collaboration skillsPreferred QualificationsProfessional Engineer (P.
Eng. or PE) licenseExperience with PWR or SMR reactor systemsFamiliarity with ASME Section III Class 1, 2, 3 component design and analysisFamiliarity with nuclear regulatory requirements (10CFR50, NUREG-0800)Experience with seismic design and analysis of equipmentA Generation Ahead by DesignInvesting 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.

📌 Mechanical Engineer II (Madrid)
🏢 Holtec International
📍 Madrid