Senior Principal Mechanical Engineer — Hybrid Nuclear Systems

Assystem

Bolton

Hybrid

GBP 90,000 - 120,000

Full time

2 days ago

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Benefits offered by this job

Holiday bonuses

Employee committee

Ongoing training

Hybrid work

Job summary

Assystem invites a Senior Principal Mechanical Engineer to join the Fusion and Modular Nuclear (FMN) business unit. You will lead design activities across cooling water systems, fuel transfer channels, and associated interfaces for cutting-edge nuclear projects.

Based in the UK with hybrid working, you will collaborate with cross-functional teams, manage DFMEA/HAZID analyses, ensure regulatory compliance, and steer design packages from concept through delivery, enabling safe, efficient net-zero

Qualifications

Leadership of multidisciplinary engineering teams across projects.
Experience defining and managing design requirements and interfaces.
Budgeting and lifecycle planning for design projects.
Expertise in cooling water systems for nuclear plant cooling.
Knowledge of regulatory requirements (ONR, Environment Agency, HSE).
Experience with DFMEA and HAZID analyses.
Experience coordinating interfaces between teams and suppliers.

Responsibilities

Lead and support the development of designs for critical cooling water and related systems.
Conduct DFMEA and HAZID to identify and mitigate risks early in design.
Create and maintain Human Factors considerations and risk registers.
Oversee the preparation of technical specifications and design packages.
Coordinate interfaces between engineering teams, suppliers, and stakeholders.
Collaborate with cross-functional teams including new and existing staff and secondees.
Ensure compliance with regulatory requirements and project standards.
Travel to Assystem offices and customer sites within the UK as required.