Mechanical Engineer II - Nuclear Systems

Holtec International; Almondsbury; Hybrid; GBP 70,000 - 100,000; Full time

Benefits offered by this job

Private health insurance

25 days annual leave

Hybrid work opportunities

Education assistance

Pension contributions

Life insurance

Job summary

Holtec International in Almondsbury near Bristol is seeking a Mechanical Engineer II to support analysis, design, and structural integrity assessments of mechanical components and reactor internals for advanced reactors and SMRs.

You will apply stress analysis, fracture mechanics, fatigue evaluation, and regulatory knowledge to deliver design calculations, fitness-for-service evaluations, and compliance with ASME BPVC and other standards, mentoring teammates along the way.

Qualifications

• Bachelor-level degree in mechanical/structural/aerospace engineering with emphasis on design analysis.
• Experience with ASME codes and regulatory frameworks for nuclear components.
• Strong writing and communication skills for technical reports and interfaces.

Responsibilities

• Perform mechanical design and stress analysis for nuclear components and supports.
• Conduct detailed stress analysis using ANSYS, LS-DYNA, MATLAB, and Mathcad.
• Perform fracture mechanics and fatigue life evaluations of metal structures.
• Ensure compliance with nuclear codes and standards (ASME BPVC II/III/XI, ANSI/N690, N14.6).
• Develop and review stress reports, calculations, and fitness-for-service evaluations.
• Review vendor reports for technical acceptance and regulatory compliance.
• Support fabrication, construction, and field issue resolution.
• Respond to regulator requests for information for licensing activities.
• Mentor engineers and provide technical leadership to the team.

Skills

Stress analysis

Fracture mechanics

Fatigue evaluation

Technical writing

Collaboration

Regulatory knowledge

Education

Bachelor's in Mechanical/Structural/Aerospace

MSE preferred

Tools

ANSYS

LS-DYNA

SolidWorks

MATLAB

Mathcad

Job description

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

Almondsbury (Bristol Area), UK – Relocation Assistance Available!

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 (10CFR50, NUREG-0800)
• Experience with seismic design and analysis of equipment

A Generation Ahead by Design™

Investing in people who power the future.

Benefits

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:

• Private health insurance for physical and mental health, 24/7 GP access, dental/optical cashback and travel insurance for you and your family
• 25 days annual leave plus bank holidays, with Christmas shutdown
• Hybrid work opportunities available where business needs and role requirements allow
• Education assistance to support continued professional growth, reimbursement of professional membership fees
• Employer matched pension contributions, life insurance, enhanced maternity/paternity benefits

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™.