Senior Mechanical Engineer

🕒 September 21, 2025

🇬🇧 United Kingdom – Remote

⏰ Full Time

🟠 Senior

🧑‍🔧 Mechanical Engineer

🇬🇧 UK Skilled Worker Visa Sponsor

This company has sponsored UK Skilled Worker visas in the past.

👻 Ghost score 48%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Assystem

WebsiteLinkedInAll Job Openings

5001 - 10000 employees

🏗️ Construction

🏥 Healthcare

📦 Logistics

💰 Post-IPO Equity on 2013-12

Construction • Healthcare • Logistics

Assystem is one of the world's leading independent nuclear engineering companies, dedicated to accelerating the energy transition. The company sees itself as an activist in the development of nuclear energy, which it believes is vital in the fight against climate change. With 6,500 employees across 12 countries, Assystem is involved in various projects related to nuclear and renewable energies, clean hydrogen initiatives, and low-carbon transport. They provide engineering services and focus on enhancing digital transformation for their clients, building innovative solutions to improve the performance of complex infrastructures. With 55 years of experience, Assystem has established itself as a key partner for major industrial groups in the energy sector.

📋 Description

• Act as Intelligent Customer role: critically assess and ensure supplier deliverables meet requirements • Develop and review Process Flow Diagrams, Piping and Instrumentation Diagrams, Layout Drawings, Sizing Calculations, Datasheets, and Specifications • Lead and review optioneering studies, Decision Record Files, Design Descriptions, and Requirement Specifications • Apply Systems Engineering: develop and review Functional and Design Requirements • Integrate Turbine Island design into the wider power plant and manage interfaces • Serve as technical contact for Turbine Island interfaces and stakeholder activities • Participate in Design Reviews and HAZID/HAZOP studies with multidisciplinary teams • Liaise with safety team on nuclear safety licensing, environmental planning/permitting, and related activities • Ensure compliance with statutory H&S policies, project quality, and the Quality Management System

🎯 Requirements

• Previous work in nuclear, thermal power, oil and gas, or other regulated sectors • Experience with steam turbines, condensers, feedwater heaters, pumps, and piping systems • Strong background in thermal power systems, with experience from FEED to detailed design and EPC delivery • Skilled in developing procurement specifications and collaborating with equipment suppliers • Extensive technical experience in thermal power or similar projects • Excellent communication and stakeholder engagement skills • Ability to identify and manage critical interfaces on major projects • Proficient in UK Health and Safety regulations, safety systems, HAZOP, and engineering standards • Knowledge of ASME, European, and UK codes and standards • Experience or awareness of Systems Engineering is a plus • Bachelor’s degree or Higher National Diploma in engineering • Chartered Engineer (CEng) or working towards it • SC Security Clearance or ability to achieve it • Ability to handle sensitive nuclear information in line with export control obligations

🏖️ Benefits

• Attractive social benefits, including an engaging Employee Committee • Holiday bonuses • Ongoing training and numerous career opportunities • High internal promotion rate (70% of managers promoted internally) • Hybrid work: 1-2 days remote per week