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Senior Mechanical Engineer United Kingdom Jobs

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Senior Mechanical Design Engineer
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Senior Mechanical Design Engineer sought for water and wastewater projects across the UK. Requires chartered status, CDM 2015 knowledge and treatment plant design experience. Mentoring role with site travel.
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Alexander Associates
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Senior Building Services Engineer (Mechanical)
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Join Assystem as a Senior Building Services Engineer (Mechanical) in Bristol and support the Hinkley Point EPR programme. Requires engineering degree, nuclear or regulated industry experience, and strong coordination skills.
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ASSYSTEM
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Senior Mechanical Engineer
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Assystem seeks a Senior Mechanical Engineer in Warrington to deliver detailed design work packs for nuclear projects. Requires regulated industry experience, mechanical design expertise, and strong stakeholder liaison skills.
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ASSYSTEM
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Senior Principal Mechanical Engineer
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Assystem seeks a Senior Principal Mechanical Engineer in Warrington to lead multidisciplinary teams on fusion and modular nuclear projects. Requires steam cycle modelling, cooling water systems expertise, and ONR compliance knowledge. Hybrid work with strong benefits.
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ASSYSTEM
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Senior Principal Mechanical Engineer
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Assystem seeks a Senior Principal Mechanical Engineer in Bolton to lead multidisciplinary teams on fusion and modular nuclear projects. Requires steam cycle modelling, cooling water expertise, and ONR compliance knowledge. Hybrid work with strong benefits.
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ASSYSTEM
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Senior Principal Mechanical Engineer
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Assystem seeks a Senior Principal Mechanical Engineer in Newcastle upon Tyne to lead multidisciplinary teams on fusion and modular nuclear projects. Requires steam cycle modelling, cooling water systems expertise, and ONR compliance knowledge. Hybrid role with strong benefits.
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United Kingdom, Newcastle upon Tyne
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ASSYSTEM
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Senior Principal Mechanical Engineer
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Assystem seeks a Senior Principal Mechanical Engineer in Bristol to lead multidisciplinary teams on fusion and modular nuclear projects. Requires steam cycle modelling, cooling water expertise, and ONR compliance knowledge. Hybrid role with strong benefits.
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ASSYSTEM
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Senior Principal Mechanical Engineer
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Assystem seeks a Senior Principal Mechanical Engineer in Derby to lead multi-disciplinary teams on fusion and modular nuclear projects. Requires steam cycle modelling, cooling water expertise, and ONR compliance. Hybrid role with strong benefits.
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ASSYSTEM
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Senior Mechanical Design Engineer (Fluid Systems)
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Assystem seeks a Senior Mechanical Design Engineer in Bolton to develop fluid systems for nuclear projects. Requires 2D/3D CAD expertise, SC Clearance eligibility, and hybrid work with strong benefits.
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ASSYSTEM
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Senior Mechanical Design Engineer (Fluid Systems)
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Assystem seeks a Senior Mechanical Design Engineer in Derby to develop fluid systems for nuclear projects. Requires 2D/3D CAD expertise, SC clearance eligibility, and hybrid work with strong benefits.
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ASSYSTEM
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Senior Mechanical Design Engineer (Fluid Systems)
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Assystem seeks a Senior Mechanical Design Engineer in Warrington to develop fluid systems for nuclear projects. Requires CAD/BIM expertise, P&ID experience, and SC Clearance eligibility. Hybrid work with strong benefits.
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ASSYSTEM
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Senior Mechanical Design Engineer (Fluid Systems)
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Assystem seeks a Senior Mechanical Design Engineer in Sunderland to develop fluid systems for nuclear projects. Requires 2D/3D CAD expertise, SC clearance eligibility, and hybrid work with strong benefits.
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ASSYSTEM
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Senior Mechanical Design Engineer (Fluid Systems)
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Assystem seeks a Senior Mechanical Design Engineer in Bristol to develop fluid systems for nuclear projects. Requires CAD/BIM expertise, P&ID experience, and SC Clearance eligibility. Hybrid work with strong benefits.
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ASSYSTEM
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Senior Mechanical Engineer
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Assystem seeks a Senior Mechanical Engineer in Warrington to deliver detailed design work packs for nuclear projects. Requires regulated industry experience, design for assembly knowledge, and strong stakeholder liaison skills.
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ASSYSTEM
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Senior Mechanical Engineer
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ASSYSTEM
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Senior Mechanical Engineer (SolidWorks)
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alten
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Senior Mechanical Engineer
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ASSYSTEM
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Senior Principal Mechanical Engineer - Water / Wastewater
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Egis Group
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Senior Principal Mechanical Engineer - Water / Wastewater
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Egis Group
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Senior Principal Mechanical Engineer - Water / Wastewater
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Egis Group
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About the Senior Mechanical Engineer role

Discover and apply for Senior Mechanical Engineer jobs, a pivotal career path for experienced professionals who drive innovation and ensure the integrity of complex mechanical systems. A Senior Mechanical Engineer is a seasoned expert responsible for the entire lifecycle of mechanical components and systems, from conceptual design and analysis to implementation, quality assurance, and project leadership. These roles are fundamental across diverse industries, including energy, manufacturing, aerospace, automotive, and industrial processing, where they translate theoretical principles into robust, real-world solutions.

Professionals in these senior positions typically undertake a wide array of critical responsibilities. They lead the design and development of sophisticated mechanical systems, performing detailed calculations, simulations, and analyses to ensure functionality, safety, and efficiency. A core aspect of the role involves creating and reviewing technical documentation, specifications, and engineering drawings. They often oversee project timelines, manage budgets, and coordinate multidisciplinary teams, acting as the technical authority. Senior Mechanical Engineers are also heavily involved in problem-solving, troubleshooting design or operational issues, and implementing continuous improvement processes. In many positions, they ensure strict compliance with industry standards, codes, and regulatory requirements, sometimes specializing in Quality Assurance/Quality Control (QA/QC) to oversee inspections, testing protocols, and material verification.

The typical requirements for Senior Mechanical Engineer jobs reflect the high level of expertise and leadership demanded. Candidates almost universally need a Bachelor’s or advanced degree in Mechanical Engineering or a closely related field. A proven track record, often 5-10 years of progressive experience, is essential, demonstrating a deep understanding of mechanical engineering principles, materials science, thermodynamics, and fluid mechanics. Proficiency in industry-standard software like CAD (e.g., AutoCAD, SolidWorks), CAE, and project management tools is expected. Strong analytical skills, meticulous attention to detail, and the ability to manage multiple complex projects are crucial. Excellent communication and interpersonal skills are paramount for liaising with stakeholders, mentoring junior engineers, and presenting technical information clearly. A commitment to professional development, often including relevant certifications, and a focus on safety and sustainability are hallmarks of successful candidates.

Exploring Senior Mechanical Engineer jobs opens doors to roles where technical mastery meets strategic leadership. These professionals are the cornerstone of engineering projects, ensuring that mechanical systems are not only designed to specification but are also reliable, efficient, and innovative. Whether focusing on design, project management, proposals, or quality control, senior engineers play an indispensable role in advancing technology and infrastructure, making this a highly sought-after and rewarding career for experienced engineering talent.