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Senior Principal Mechanical Engineer

Bolton, England, gb💼 Full-time🗓 2026-10-06 → 2026-10-07

Core

Lead design and development of mechanical systems for fusion and modular nuclear power generation, including personnel airlocks, hatches, fuel transfer channels, and cooling water systems.

Role type

Senior Principal Mechanical Engineer (Nuclear Systems) (via careerplan.io/jobs/744000153793565-senior-principal-mechanical-engineer-at-assystem)

Builds

Nuclear reactor components and cooling water systems for net-zero power generation

Domain

Nuclear Energy / Fusion and Modular Nuclear

Required skills

DFMEA, HAZID, Human Factors Checklists, Risk Register management, Design Package Production, Interface Management, Technical Specifications, Multi-disciplinary Team Leadership, Steam Cycle Modelling, Project Budgeting, Cooling Water Equipment Design, Regulatory Compliance (ONR, HSE), Requirements Capture, Systems Engineering, Subcontractor Management

Preferred skills

Chartered Engineer (CEng), SC Security Clearance Eligibility, UK Residency, Travel within UK

Technologies

Nuclear design tools, Steam cycle modelling software, Risk management frameworks

Responsibilities

Lead design development for nuclear systems (airlocks, hatches, fuel channels, piping/electrical penetrations), Conduct DFMEA and HAZID studies, Manage project Risk Register, Oversee design package production, Coordinate interfaces between engineering teams and suppliers, Develop technical specifications for procurement and installation

Seniority

Senior, hands-on IC with leadership responsibilities