Senior principal mechanical engineer Work, Jobs in Sunderland, Twr (with Salaries)

Senior Principal Mechanical Engineer
Assystem —Sunderland
- Travel
- In-person
- Leadership
Senior Piping Engineer
Altrad —Teesside
- CAD
- Engineering
- System design
Quick apply
Senior Mechanical Engineer
Assystem —Newcastle upon Tyne
- AutoCAD
- Engineering
- Bachelor's degree
Principal Mechanical Engineer
Assystem —Newcastle upon Tyne
- AutoCAD
- CAD
- Engineering
2d
Principal Layout Integration Engineer
Assystem —Newcastle upon Tyne
- Engineering
- Business development
- IT
- Annual leave
- Referral programme
Senior / Principal Electrical Engineer (Building Services)
WSP —Newcastle upon Tyne
- Part-time
- Hybrid work
- Engineering
- Master's degree
- Bachelor's degree
- Free parking
- Flexitime
Principal Cable System Design Engineer
AECOM —Newcastle upon Tyne
- Full-time
- Hybrid work
- Engineering
- Master's degree
- Mentoring

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Senior Piping Engineer
Altrad —Teesside
The successful candidate will lead piping engineering and design activities for industrial projects, including the development of 2D and 3D layouts,…
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Senior Mechanical Engineer
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Attractive social benefits, including an engaging Employee Committee and holiday bonuses. ️ Liaise on Safety: Collaborate with the safety team on nuclear safety…

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senior principal mechanical engineer jobs near sunderland, twr

Senior Principal Mechanical Engineer

Assystem -
Sunderland

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Job details

Permanent

Qualifications

Systems engineering
Water systems
Requirements gathering
Leadership
Communication skills

Full job description

Nuclear

Permanent /

Sunderland

United Kingdom

27/03/26

On site

ABOUT ASSYSTEM

Assystem is a global leader committed to accelerating the energy transition. With 7,750 employees across 12 countries, we tackle the monumental task of switching to low-carbon energy. Our 55+ years of experience in highly regulated sectors ensure we deliver top-notch engineering, project management, and digital solutions.

JOB DESCRIPTION

Join the Fusion and Modular Nuclear Business Unit! Assystem has an exciting opportunity for a Senior Principal Mechanical Engineer to join our expanding Fusion and Modular Nuclear (FMN) business unit. As leaders in the design and development of new technologies, you will have the opportunity to work across multiple cutting-edge projects developing technical solutions making net-zero power generation a reality.

Your mission:

️ Lead and support the development of designs for the following systems:
Personnel Airlocks, Main Equipment Access Hatch, Fuel Transfer Channel, Piping Penetrations, Electrical Penetrations, Specialist Nuclear Doors
Conduct DFMEA (Design Failure Mode and Effects Analysis) to identify and mitigate potential failure modes early in the design process.

️ Perform HAZID (Hazard Identification Study) to assess and document risks across the system.

Complete and maintain Human Factors Checklists to ensure ergonomics and usability are considered in design decisions.
Update and manage the project’s Risk Register to track, evaluate, and mitigate emerging risks.
Design Package Production in Line with Requirements – Oversee the creation of comprehensive design packages, ensuring alignment with project specifications, technical standards, and operational needs.
Management of Interfaces – Coordinate effectively between engineering teams, suppliers, and stakeholders to ensure seamless integration of cooling water systems with other reactor components.
️ Preparation of Technical Specifications – Develop clear, detailed technical specifications to guide procurement, fabrication, and installation of key cooling water system components.
Collaborate with cross-functional teams, including both new and existing FTEs and secondees across engineering and project functions.

Why Join the Community of Switchers?

Over 55 years in nuclear engineering.
Ranked among the top 3 largest nuclear engineering companies.
Attractive social benefits, including an engaging Employee Committee and holiday bonuses.
Ongoing training with numerous career opportunities.
70% of our managers are promoted internally!
Hybrid work: 1-2 days remote per week.

MY PROFILE

Multi-Disciplinary Team Leadership – Skilled in managing and coordinating diverse engineering teams.

️ Steam Cycle Modelling Oversight – Ability to define modelling outcomes and ensure accurate implementation.

Project Budget & Lifecycle Planning – Experienced in budgeting and planning for full design lifecycles.

️ Cooling Water Equipment Expertise – Strong track record in designing and optimizing cooling water systems.

Regulatory & Compliance Knowledge – Well-versed in ONR, Environment Agency, and HSE regulations.
Requirements Capture Experience – Skilled in gathering and defining technical requirements.
Systems Engineering Awareness – Strong understanding of integrated design principles.
Subcontractor Management – Experienced in overseeing and coordinating subcontractors.
Chartered Engineer (CEng) – Professional accreditation in a relevant discipline.
Security Clearance Eligibility – Capable of obtaining SC clearance for secure projects.

️ Excellent communication skills, written and oral
Strong leadership skills

Focus on delivering quality output to time and budget

Act with integrity and instils this in others
Has an appreciation of wider technical issues beyond own discipline – Understands interdisciplinary challenges and their impact on projects.
Ability to work with a high degree of independence, using their own initiative and self-motivation – Proactive and capable of managing tasks autonomously.
Confident in a multi-party, multi-national environment – Comfortable working with global teams and diverse stakeholders.
✈️ Ability to travel to Assystem offices and customer sites within the UK
To undertake work packages supporting major UK and international Nuclear Clients – Contributes to high-profile nuclear projects with global impact.

Due to the nature of work to be undertaken applicants will be required to meet certain residency criteria in order to attain a minimum level of UK security clearance if not already security cleared to a minimum SC level.

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.

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senior principal mechanical engineer jobs in sunderland, twr

Senior Principal Mechanical Engineer

Senior Piping Engineer

Senior Mechanical Engineer

Principal Mechanical Engineer

Principal Layout Integration Engineer

Senior / Principal Electrical Engineer (Building Services)

Principal Cable System Design Engineer

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