Assystem Logo

Assystem

Senior Mechanical Engineer

Posted 4 Hours Ago
Be an Early Applicant
Hybrid
Warrington, Cheshire, England
Senior level
Hybrid
Warrington, Cheshire, England
Senior level
Deliver and check mechanical engineering work scopes for nuclear projects, including detailed design work packs, calculations, drawings, technical files, and design substantiation. Supervise mechanical designers, support manufacturing, testing, and execution, and collaborate with multidisciplinary and plant-based teams. Ensure machinery and UKCA compliance while managing workload, stakeholders, quality, schedule, and cost constraints.
The summary above was generated by AI
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 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.

Job Description

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.

Qualifications

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.

Additional Information

Security clearance:

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.

NOTICE TO CANDIDATES ON RECRUITMENT FRAUD - We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. Please note that we will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.

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.

Similar Jobs

Senior level
AdTech • Cloud • Digital Media • Information Technology • News + Entertainment • App development
Manages the technical delivery of ride and show mechanical systems, including budgets, schedules, specifications, vendor contracts, design, fabrication, installation, testing, safety, and acceptance. Leads technical teams and coordinates vendors, contractors, construction teams, and project stakeholders. Ensures engineering quality, risk management, regulatory compliance, and adherence to Universal standards throughout attraction development.
Yesterday
Hybrid
London, Greater London, England, GBR
Senior level
Senior level
Consulting
Leads mechanical engineering delivery for complex data centre projects across multidisciplinary and geographically distributed teams. Provides technical leadership, supports project management, contributes to thought leadership, and helps expand AECOM’s hyperscale and colocation data centre practice. Responsibilities include applying knowledge of building systems, permitting, regulations, construction methodologies, and digital design workflows while managing multiple projects and client relationships.
Top Skills: Revit
2 Days Ago
In-Office
London, Greater London, England, GBR
Senior level
Senior level
Aerospace • Hardware • Robotics • Quantum Computing
Lead mechanical, thermal, magnetic shielding, packaging, and alignment design for chip-scale atomic clocks, magnetometers, and gyroscopes. Own products from concept through prototypes, testing, drawings, production release, and volume manufacturing. Build thermal and structural models, design vacuum and hermetic packages, conduct vibration and environmental testing, develop fixtures and tooling, establish design standards, and collaborate with physics, photonics, electronics, manufacturing, and UK suppliers.
Top Skills: AnsysAsme Y14.5ComsolCreoDef Stan 00-35Environmental QualificationFinite Element AnalysisGd&THermetic PackagingIso GpsLeak TestingMagnetic ShieldingMil-Std-810Optical AlignmentOutgassing ControlShock TestingSolidworksThermal ModelingVacuum PackagingVibration Testing

What you need to know about the London Tech Scene

London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account