Mechanical Engineer jobs in United Kingdom

Our Vacancy# Mechanical Engineer* Defence* Contracting /* Warrington* United Kingdom* 20/11/25* On site* ShareAssystem is an international company with one mission: accelerate the energy transition around the world. Every day, our 8,000 switchers located in 12 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low-carbon energy. We are a collective committed to the actors who are making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition. Drawing on more than 55 years’ experience in highly regulated sectors subject to strict security and safety requirements, we provide our customers with engineering and project management services, as well as digital services and solutions to optimize the performance of complex infrastructure projects throughout their life cycle. The Group is currently ranked second in the world for nuclear engineering. To ensure a viable, efficient, and reliable energy future for all## Job Description**Mechanical Engineer – Heat Exchanger Design & Manufacture**Contract Duration: 12 months.Location: Warrington / Hybrid 3 days minimum office workingStart Date: ASAP**Overview**We are seeking an experienced Engineer with a strong background in design and manufacture with pressure vessel design codes. The successful candidate will support design close out and manufacturing documentation for high-integrity shell and tube heat exchangers and/or pressure vessels within the nuclear sector.**Key Responsibilities*** Support the close-out of design and manufacturing documentation from concept through to manufacture and delivery.* Design by Analysis (DBA) assessments in compliance with relevant industry codes.* Prepare, review, and interpret detailed manufacturing drawings, specifications, and documentation.* Liaise with multidisciplinary teams including design, manufacturing, and quality engineering.* Contribute to technical documentation, including design calculations, specifications, and drawings.**Essential Skills & Experience*** Proven experience in the design and manufacture of shell and tube heat exchangers / pressure vessels.* Knowledge of FEA.* Experience with design by analysis methods and code assessments.* Working knowledge of pressure vessel codes with ability to interpret and apply design code requirements.* Ability to read, produce, and check manufacturing drawings and technical documentation.* Strong appreciation of general manufacturing processes, including materials, fabrication, and inspection methods.**Desirable Skills & Experience*** Experience with one of the following RCC-M / ASME III / ASME VIII / BS EN 13445.* Knowledge of quality assurance and regulatory requirements for high-integrity equipment.* Experience with AutoCAD.**Qualifications*** Degree (BEng/MEng or equivalent) in Mechanical Engineering or related discipline.* Chartered Engineer status (CEng) desirable but not essential.**Personal Attributes*** Strong analytical and problem-solving skills.* Excellent attention to detail with a commitment to high-quality outputs.* Effective communicator with ability to work in multidisciplinary teams.* Proactive, self-motivated, and able to manage workload to meet deadlines.**\*\*Security clearance\*\***This role requires the successful candidate to hold a minimum of a Security Check (SC) clearance without any caveats to that clearance.Due to the nature of work this role will be delivering and for the protection of certain assets, the successful candidate has to be a UK national or in MoD approved cases a Dual National from a non-ITAR country.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.