Mechanical Engineer II - Nuclear Systems

Holtec; Almondsbury; Hybrid; GBP 74,300 - 100,305; Full time

Benefits offered by this job

Hybrid work options

Medical, dental and vision coverage

401(k) retirement plan

Job summary

Holtec is seeking a Mechanical Engineer II - Nuclear Systems to support analysis, design, and integrity assessments for components and reactor internals in advanced nuclear systems. This role requires stress analysis, fracture mechanics, fatigue evaluation, and regulatory compliance within multidisciplinary projects.

The candidate will perform ASME BPVC based design and analysis, review vendor reports, and mentor junior engineers while contributing to licensing support.

Qualifications

• Bachelor’s degree in Mechanical, Structural, or Aerospace Engineering (MSE preferred).
• 5-7 years of experience in mechanical design analysis and component integrity.
• Knowledge of material degradation mechanisms including brittle fracture and fatigue.

Responsibilities

• Perform mechanical design and stress analysis for ASME BPVC II/III/XI 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.

Skills

Stress analysis

Fracture mechanics

Fatigue evaluation

ANSYS

LS-DYNA

SolidWorks

Technical writing

Communication

Education

Bachelor’s degree in Mechanical, Structural, or Aerospace Engineering (MSE preferred)

Tools

ANSYS

LS-DYNA

SolidWorks

Job description

Mechanical Engineer II - Nuclear Systems

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.

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.

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$100,000 to $135,000.
• Industry-leading medical, dental, and vision coverage with a generous employer premium contribution and Day1 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.