Warrington, England, United Kingdom · On-site
Company Description Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakehold…
Skills: Mechanical Design, Nuclear Engineering, Design For Assembly, Technical File Production, UK CA Compliance
Warrington, England, United Kingdom · On-site
Company Description Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakehold…
Skills: Electrical Engineering, Control Engineering, Instrumentation Engineering, Technical Leadership, Safety-Critical Systems
Warrington, England, United Kingdom · Hybrid
Company Description Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakehold…
Skills: Electrical Services Design, CDM Regulation, Space Management, Cable Routing, Cable Management
Warrington, England, United Kingdom · On-site
Company Description Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakehold…
Skills: Engineering Leadership, EC&I Engineering, Nuclear Design, Safety Case Development, Project Management
Warrington, England, United Kingdom · On-site
Company Description Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakehold…
Skills: Engineering Leadership, Project Delivery, Nuclear Engineering, System Engineering, NEC3 Contracts
Warrington, England, United Kingdom · On-site
$40k–$43k/yr
Fire Door Joiner Location: Field based, nation wide with a base in Chorley Salary: £40,000 - £42,500pa depending on experience Urmson Group (proudly part of the HSL Compliance Group) is a dynamic network of companies off…
Skills: Fire Door Installation, Fire Door Inspection, Joinery, Remedial Works, Digital Compliance Reporting
Warrington, England, United Kingdom · Hybrid
At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in s…
Skills: EC&I Electrical Systems Design, FEED Pipeline, Optioneering, Front-End Design, Detail Design
Warrington, England, United Kingdom · Hybrid
At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in s…
Skills: Electrical Systems Design, CE&I Engineering, FEED Pipeline, Process Instrumentation Design, LV Electrical Power Design
Warrington, England, United Kingdom · Hybrid
Company Description Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakehold…
Skills: Turbine Island Design, Thermal Power Systems, Systems Engineering, Procurement Specifications, HAZOP/HAZID
Warrington, England, United Kingdom · Hybrid
Company Description Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakehold…
Skills: Mechanical Engineering, DFMEA, HAZID, Human Factors Engineering, Risk Management
Banbury, England, United Kingdom · Hybrid
About The Team: Are you passionate about building food safety standards and systems across multiple countries, TL, Int'l Supplier FSQA - PHF Processed and driving food safety culture to the next level? As the Team Lead, …
Skills: Food Safety, Quality Assurance, Supplier Quality Management, Leadership, Risk Management
Warrington, England, United Kingdom · On-site
$40k–$42k/yr
Passive Fire Engineer Location: Nationwide / Field-Based (Reporting to Chorley) Salary: £40,000 - £42,000 R J Urmson Group (proudly part of the HSL Compliance Group) is an integrated specialist provider encompassing HVAC…
Skills: Passive Fire Protection Surveying, Firestopping Installation, Technical Blueprint Interpretation, BORIS Software, Building Regulations Knowledge
Warrington, England, United Kingdom · Hybrid
Company Description Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakehold…
Skills: Configuration Management, Technical Documentation, Design Change Control, Interface Management, Technical Baselines
Warrington, England, United Kingdom · Hybrid
At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in s…
Skills: EC&I Design, Radiometric Systems, Configuration Management, Change Control, Technical Oversight
City of Leicester, England, United Kingdom · Hybrid
Job Title: Senior Safety Case Consultant Location: Flexible, UK + Hybrid Working Arrangements Compensation: Competitive Salary + Benefits Role Type: Full Time, Permanent Role ID: SF61039 Shape Safety Strategy Across Comp…
Skills: Safety case development, HAZID, HAZOP, Hazard management, Radiological safety assessment
City of Leicester, England, United Kingdom · Hybrid
Job Title: Principal Safety Case Consultant Location: Flexible, UK + Hybrid Working Arrangements Compensation: Competitive Salary + Benefits Role Type: Full Time / Permanent Role ID: SF61045 Drive Safety Case Strategy Ac…
Skills: Nuclear safety, Hazard management, HAZID, HAZOP, Radiological safety assessment
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Deliver mechanical work scopes including detailed design work packs and the supervision of designers for layout and detailed drawings. Support the project through all phases, including testing, execution, and the compilation of technical files for machinery compliance.
Requires extensive experience in highly regulated industries, preferably nuclear, with a strong understanding of Design for Assembly and UK CA compliance. Must be proficient in mechanical calculations, fabrication processes, and capable of attaining UK security clearance.
Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements.
Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.
Senior Mechanical Engineer
Location: Warrington
Type: Staff / Contract (Inside IR35)
Role Description
🔧 The Mechanical Senior Engineer is required to deliver the mechanical work scope, including production and checking, reporting to a Principal Engineer.
🛠️ They will need to deliver detailed design work packs and supervise designers in the production of layout and detailed design drawings.
🚀 The project is in the latter stages of preliminary design with mock-up parts, with certain assemblies in final manufacturing and testing.
👷 The Mechanical Senior Engineer will be required to support the design through all project phases, testing, and execution of the parts required in this current phase.
🤝 They will work closely with the multi-discipline design team and plant-based team.
📋 The role includes guiding Mechanical Designers and Engineers in the production of detail drawings, sub-assemblies, GA, layout drawings, flow diagrams, and parts lists.
📐 May be required to produce calculations to verify detailed design and design substantiation.
📁 The production and compilation of technical files for machinery/UK CA compliance (e.g., RA’s, O&M manuals, etc.) will also be a requirement.
Essential Experience & Qualifications
✅ Experience of working within a highly regulated industry, preferably within the nuclear industry.
🛠️ Familiarity with ‘Design for Assembly’ within a nuclear facility.
📈 Ability to manage own workload and drive the completion of the work scope.
📘 Strong understanding of delivering mechanical designs in the nuclear sector.
📂 Experience in producing technical files (UK CA and machinery directive compliance).
🛡️ Knowledge of machining and fabrication manufacturing processes.
📊 Experience in producing and checking mechanical engineering calculations and deliverables.
🤝 Skilled in liaising with key stakeholders and other design disciplines.
✍️ Competent report writing skills for clear and concise findings.
⏳ Comfortable working under time and cost constraints.
💬 Excellent communication skills with team members and the Client.
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.
Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition. We see ourselves as an activist in the development of nuclear energy, convinced that it is an essential part of the fight against climate change. 8,000 switchers, spread in 13 countries in Europe, Asia, Africa and the Middle East are working every day to make the energy switch by accelerating the development of nuclear and renewable energies, power grids, clean hydrogen projects and low-carbon transport. We design and supervise major projects through our engineering activities and accelerate our customers' digital transformation. We also develop new solutions to build faster and improve the performance of complex infrastructures. 59 years of experience have made Assystem a key partner of the world's largest industrial groups: CEA, EDF, ENEC, Enedis, Engie, Framatome, ITER, K.A. CARE, Naval Group, NICDC, Orano, RATP, Rolls Royce, Royal Commission, Sellafield, SNCF... Assystem is ranked in the Top 3 companies in the nuclear energy sector.
Offices: 11, Allée de l'arche, Tour Egée, Courbevoie, Ile-de-France 92400, FR · 6998 King Fahd Rd, 4540, Al Olaya, Riyadh 12331, Arabie saoudite, Al Olaya, SA · Olaya, Al Khobar 31952, Arabie saoudite, Al-Khobar, 31952, SA · 161 Castlereagh Street, Sydney, AU · Omar Ibn El Khattab, Intercontinental CityStar Hotel, 2ème étage, Le Caire, 11757, EG
There are currently 156 open security & safety positions in Warrington, United Kingdom listed on Clera. New openings are added daily as companies post roles.
Companies currently hiring include Assystem, Babcock International Group, Amentum, Rolls-Royce SMR, HSL Compliance, among others. Browse the listings above to see every active employer.
Yes — 95 of the 156 open security & safety positions offer remote or hybrid work (1 remote, 94 hybrid).
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