Senior Mechanical Responsible Engineer - Nuclear Safety

Assystem; Warrington; On-site; GBP 70,000 - 105,000; Full time

Job summary

Assystem in the United Kingdom is seeking a Mechanical Responsible Engineer to lead mechanical and ventilation engineering within a nuclear/high‑hazard project in Warrington. The role carries full technical accountability across the lifecycle, including safety, compliance and governance for engineering decisions.

Working to high-integrity standards, you will collaborate with project teams, regulators and assurance bodies, ensuring robust safety, quality and risk management while maintaining

Qualifications

• Degree (or equivalent) in Mechanical Engineering or related discipline.
• Extensive experience aligned to a Responsible Engineer role.
• Chartered Engineer (or equivalent) with a recognised institution.
• Able to meet security clearance & site access requirements.

Responsibilities

• Strong mechanical engineering background in regulated, safety-critical environments.
• Proven technical accountability & decision-making experience.
• Ensure compliance with legislation, standards, and safety requirements.
• Establish governance, assurance & verification processes.
• Lead multi-disciplinary teams & resolve complex technical issues.
• Manage technical risks effectively.
• Interface with project teams, regulators & assurance bodies.
• Promote a strong safety, quality & compliance culture.

Skills

Mechanical engineering

Safety-critical environments

Technical accountability

Regulatory compliance

Governance & leadership

Stakeholder interface

Risk management

Education

Degree in Mechanical Engineering or related

Chartered Engineer

Job description

Assystem in the United Kingdom is seeking a Mechanical Responsible Engineer to lead mechanical and ventilation engineering within a nuclear/high‑hazard project in Warrington. The role carries full technical accountability across the lifecycle, including safety, compliance and governance for engineering decisions.

Working to high-integrity standards, you will collaborate with project teams, regulators and assurance bodies, ensuring robust safety, quality and risk management while maintaining