Lead Nuclear Systems Engineer, SMR-300

Holtec International; Almondsbury; On-site; GBP 90,000 - 120,000; Full time

Job summary

Holtec International seeks a Senior Nuclear Systems Engineer to act as the technical authority for Nuclear Island systems, independently leading system-level design, integration, and licensing activities within a highly regulated program.

You will mentor junior engineers, drive system requirements, and collaborate with licensing, safety, and manufacturing teams to deliver safe, compliant plant designs for the SMR-300 project.

Qualifications

• 8+ years of progressive engineering experience.
• Experience as system owner or lead engineer for safety-related Nuclear Island (NI) systems on a nuclear plant.
• Mentor and develop junior engineers; review designs, calculations, and system-level deliverables.
• Strong fundamentals in heat transfer and fluid dynamics; apply to complex plant systems.

Responsibilities

• Lead multi-disciplinary system engineering and integration activities across major SMR-300 plant systems.
• Develop and manage system requirements, interface definitions, and component specifications.
• Mentor engineers and review calculations, specifications, and technical deliverables.
• Perform analyses and calculations in thermal-fluids and overall plant system performance.
• Coordinate with licensing, safety, and regulatory teams to support safety case development.
• Collaborate with internal teams, suppliers, and manufacturing partners to ensure designs are sound and executable.
• Support design reviews and internal approvals aligned with milestones and quality standards.
• Serve as technical lead for assigned Nuclear Island systems and own system integration and cross-discipline alignment.
• Deliver system-level engineering scope for the SMR-300 program with high safety and regulatory rigor.

Skills

Leadership

Mentoring

Technical writing

Stakeholder engagement

Communication

Education

Bachelor’s degree in Engineering

Master’s degree preferred

EIT/PE certification preferred

Tools

SmartPlant

Mathcad

AutoCAD

Pipe Flo

HTRI

ELM

DOORS NG

Job description

Holtec International seeks a Senior Nuclear Systems Engineer to act as the technical authority for Nuclear Island systems, independently leading system-level design, integration, and licensing activities within a highly regulated program.

You will mentor junior engineers, drive system requirements, and collaborate with licensing, safety, and manufacturing teams to deliver safe, compliant plant designs for the SMR-300 project.