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Contractor 24
principal mechanical design engineer

24 principal mechanical design engineer jobs found

CL
Jul 18, 2026  
Principal Mechanical Water Design Engineer
Principal Mechanical Engineer Shape the Future of Our Cities and Environments Our client is seeking an experienced and dynamic Principal Mechanical Engineer to join their Design & Advanced Technology (D&AT) team. As part of a talented, multi-disciplinary group, you will be at the forefront of delivering innovative and iconic projects within the Water market. This is an opportunity to work on cutting-edge engineering projects that have a global impact, contributing to critical UK infrastructure both domestically and internationally. This role offers you the chance to make a significant impact, playing a key role in transformational programmes while delivering industry-leading solutions throughout the project lifecycle. Location: Hybrid working available (3 days per week office/site-based) Type: Contract Rate: £68 per hour Your Role As a Principal Mechanical Engineer, your responsibilities will include: ·Leading a team of Mechanical engineers in delivering technical...
IR35 Status:
Unknown Status

CV-Library Central London, London WC2N 5DU, UK Contractor
CL
Jul 18, 2026  
Principal Mechanical Water Design Engineer
Principal Mechanical Engineer Shape the Future of Our Cities and Environments Our client is seeking an experienced and dynamic Principal Mechanical Engineer to join their Design & Advanced Technology (D&AT) team. As part of a talented, multi-disciplinary group, you will be at the forefront of delivering innovative and iconic projects within the Water market. This is an opportunity to work on cutting-edge engineering projects that have a global impact, contributing to critical UK infrastructure both domestically and internationally. This role offers you the chance to make a significant impact, playing a key role in transformational programmes while delivering industry-leading solutions throughout the project lifecycle. Location: Hybrid working available (3 days per week office/site-based) Type: Contract Rate: £68 per hour Your Role As a Principal Mechanical Engineer, your responsibilities will include: ·Leading a team of Mechanical engineers in delivering technical...
IR35 Status:
Unknown Status

CV-Library Cambridge, UK Contractor
CL
Jul 18, 2026  
Senior Design Engineer
BAE Systems ref: V05895 Title: Senior Design Engineer - Mechanical/Piping 12 month contract  £42.08 per hour Umbrella - Inside IR35  2-3 days per week onsite - BAE Systems Portsmouth  Ideally candidates must hold an existing UK security clearance or be eligible to obtain.  Role Description  To undertake a defined range of detail design activities in line with all relevant processes and quality requirements of Mechanical/Piping design package and reports for Installation solutions on Legacy Warships, supplying advice and support to operations and other functions and/or to organise and co-ordinate aspects of detail design activity ensuring defined objectives are achieved whilst continually maintaining quality and service requirements. Core Duties (GTI Description) Typical duties include (but are not limited to): (suggested 5-10 bullets/statements, indicative of the role at this level) · Support the development of best practice to increase the capability,...
IR35 Status:
Inside IR35

CV-Library Portsmouth, UK Contractor
CL
Jul 16, 2026  
Principal Mechanical Engineer
Job Role: Senior Revit Technician Rate: £40-45p/h inside IR35 Location: Remote working Duration: 12-month contract Our client is looking for a talented and motivated Revit Technician to join their multi-disciplinary design team, as part of a growing and dynamic department providing detailed designs for water related projects in the UK. About the role: By working on landmark projects and schemes of all shapes and sizes to help their clients tackle climate change and improve the UK's nature water resource, you will have the opportunity to develop your technical and professional expertise. You will learn from experienced industry professionals who share a passion for working together with their customers to deliver high quality projects. You will: Creating 3D models in Revit and as required AutoCAD, Civil 3D and Navisworks, including reviewing project set ups and management of models. Working in tandem with multi-disciplinary Engineers to provide solutions to our client's...
IR35 Status:
Inside IR35

CV-Library United Kingdom Contractor
CL
Jul 12, 2026  
Principal Design Engineer - Vehicle and Powertrain Integration
Contract Position Outside IR35 On-site/Hybrid in West Sussex Our Client, is seeking an enthusiastic and dynamic Principal Design Engineer - Vehicle and Powertrain Integration on a contract basis. As part of the Global Mechanical Design team, you will be pivotal in leading design activities for vehicle engineering and powertrain integration, particularly for heavy-duty and off-highway vehicles used in defence and commercial applications. Must have proven Engine Development experience, Leading Design Deliverable and use of CREO. Key Responsibilities: Conceptual and definitive 3D mechanical design of systems, assemblies, and complex components, including the integration of powertrain, steering, braking, and auxiliary systems into vehicles. Detailed mechanical design tasks including stress calculations, FMEA, 2D detailing, and tolerance stacks. Collaboration with FEA/Simulation teams to ensure design validation. Working closely with manufacturing engineers to meet DFMA...
IR35 Status:
Outside IR35

CV-Library West Sussex, UK Contractor
CL
Jul 12, 2026  
Principal Pipeline Engineer - Low Carbon
Location: Remote (Occasional travel to Manchester, London, Newcastle & Glasgow) IR35 Status: Inside IR35 The Opportunity We are currently seeking an experienced Principal Pipeline Engineer to join a rapidly growing Energy Transition team supporting the design and delivery of cutting-edge low-carbon infrastructure projects across the UK. This is an exciting opportunity to play a leading technical role on nationally significant projects focused on the future of the UK energy sector, including hydrogen transmission systems, carbon capture infrastructure, natural gas networks, and wider decarbonisation technologies. Working within a multidisciplinary engineering environment, you will take ownership of pipeline and mechanical engineering design activities across the full project lifecycle - from early-stage concept development and FEED through to detailed design, construction, commissioning, and long-term operational support. This position offers the opportunity to work on some...
IR35 Status:
Inside IR35

CV-Library United Kingdom Contractor
CL
Jul 19, 2026  
Lead Process Engineer
Our client is currently looking for a Lead Process Engineer for a site based in Peterborough, the position will be Outside IR35 on a long term contracting basis with the work being in the clean water industry. Candidate will be responsible for the Process design of clean water pumping stations, dosing packages and control systems to achieve the goal of the end client, you will also be performing process calculations, hydraulics, unit processes including control valves sizing and selection, pump calcs, capacity canulations and water quality assessments. The client is looking for candidates that have a history of Process Engineer in regulated industries specifically within the Clean Water industry and have Water treatment experience and system control experience. During the role you will be ensuring all technical work is undertaken to the correct standards & specifications and ensuring all the requirements of MAS are adhered to & challenge when applicable. Candidates must...
IR35 Status:
Outside IR35

CV-Library Peterborough, Cambridgeshire Contractor
CL
Jul 18, 2026  
Principal Cloud Architect
3 Month intial contract, scope for extension Inside IR35, (Apply online only) a day Location: Southampton - 2 x a week on site Role Overview We are seeking an experienced Principal Cloud Platform Engineer with strong DevOps leadership capability to support the design, delivery and continuous improvement of secure, scalable and resilient cloud platforms across Azure and AWS environments. The role will focus on building and governing cloud architecture patterns, landing zones, infrastructure standards and automation practices, while working closely with engineering, security, product and delivery teams. The successful candidate will provide manager-level technical leadership across DevOps, cloud platforms, Infrastructure as Code, CI/CD, networking, security, observability and reliability engineering. They will help shape enterprise-scale transformation, hybrid cloud strategy and platform services aligned to the Azure Well-Architected Framework, ensuring solutions are robust,...
IR35 Status:
Inside IR35

CV-Library Southampton, Hampshire Contractor
CL
Jul 18, 2026  
Site Manager
NES Fircroft are currently recruiting for a Site Manager for our client, who are the operator on a flagship UK power project.  Site Manager Location: Norfolk Duration 12 months Outside IR35 The Onshore General Site Manager is to act as the onsite Client Represent active during the site initial designs, constructability assessments and planning and later construction and handover of the works. Supports the HVDC Package Manager through the construction phase, and manages all aspects of the Client’s site duties under the Contract. The role will co-ordinate the client site representatives and and site information within the project. The role will facilitate resolution of site-based issues to ensure that employers risks are mitigated through regular/adhoc meetings, discussions, ensuring adequate recording of such. The role will have support of the Package Manager in representing and resolving site issues with the Contractor’s Senior Management team. The role will be...
IR35 Status:
Outside IR35

CV-Library Necton, UK Contractor
CL
Jul 18, 2026  
Construction Project Manager
We are looking for a Construction Assistant Project Manager to join a client's site based in Somerset. Nature and Scope: The nature of the role is to provide leadership to ensure the effective delivery of activities in the programme, while recognising and managing the impacts of the programme on the wider Project. The Project Manager will apply a project management approach to activities relating to design principles and system design which are undertaken by the Architect Engineer, detailed design, manufacturing, and construction which are largely delivered through contracts and commissioning managed through integrated contractor and company teams to ensure all activities are delivered safely, to quality, budget, and schedule. The Project Manager is responsible for the delivery of a specific set of activities to time, cost, safety, and quality including the day-to-day management. Leadership is crucial as the Project Manager will be required to establish and lead diverse project...
IR35 Status:
Unknown Status

CV-Library Somerset, England Contractor
CL
Jul 18, 2026  
Principal Systems Engineer
Principal Systems Engineer (Ref: 1705) Initial contract until March 2027 £71.74ph LTD (Outside IR35) Basildon - full time onsite SC required, can start on BPSS The Role: Work closely with the Project Chief Engineer to identify and resolve technical issues across the whole system and subsystems and to ensure the integrity of the solution. Deputise for the Project Chief Engineer within the project. Lead the architecture team to develop and document the architecture thought the project lifecycle. Lead the integration activity of sub-systems Lead the engagement with technical suppliers Influence all levels of requirements to enable design and development decisions and trade-offs to be made. Provide direction, control, evaluation and recommendations relating to technical risks and opportunities. Support test planning and requirements verification to achieve certification and delivery for the overall system. Working with and influencing key project stakeholders including customer and...
IR35 Status:
Outside IR35

CV-Library Basildon, Essex Contractor
CL
Jul 18, 2026  
Facilities/Building Services Engineer
Expleo is currently seeking an experienced Facilities/Building Services Engineer to join our team on a 12-month contract basis, supporting a prestigious customer based in Solihull. This is an exciting opportunity to play a key leadership role within a fast-paced automotive/manufacturing environment. Contract Rate:- £28.42 ph Inside IR35 WHAT TO EXPECT Trim and Final Facilities are responsible for the development and introduction of new and modified facilities associated with new model introductions and model year changes. Ensure facility installations are delivered through strict adherence to Product Creation and Delivery System (PCDS) and Launch Quality Operating System (LQOS) Gateways deliverables. Key Responsibilities Project manage the planning and implementation of facility installations for new model introductions. Creation of detailed facility timing plans in line with manufacturing launch strategies. Layout planning and creation of new and modified facilities to...
IR35 Status:
Inside IR35

CV-Library Solihull, West Midlands Contractor
CL
Jul 16, 2026  
PTS Project Engineer
Our client is delivering a major package of rail and civil engineering works on the nationally significant Sizewell C project. These works form a critical part of the wider programme supporting construction logistics for one of the UK's largest energy infrastructure projects. We are looking to appoint a highly capable Project Engineer / Senior Engineer with a strong rail and civil engineering background. This role would suit an individual who has developed through a Site Engineer → Site Agent → Project Engineer career path and is confident taking ownership of engineering delivery, temporary works, quality management, and technical assurance on complex rail infrastructure schemes. Key Responsibilities: Lead the engineering function for a package of rail and civils works Act as the primary technical point of contact between site teams, subcontractors and project management Manage engineering support for level crossing, drainage, earthworks, structures and associated rail...
IR35 Status:
Unknown Status

CV-Library Ipswich, Suffolk Contractor
CL
Jul 16, 2026  
Senior Mechanical Design Engineer
Senior Mechanical Design Engineer Birmingham I am seeking a Senior Mechanical Design Engineer for an established automotive engineering company. This is a contract role outside ir35. They are part of a growing successful business operating in the supply of proprietary systems and components to the world's construction equipment, truck, agricultural machinery and industrial applications end-markets. The company has a global manufacturing presence including in the USA, Germany, UK, Sweden, India and China. What You Will Do: As Senior Mechanical Design Engineer; To assist in the design of a range of engine ancillaries including oil, water & fuel pumps Concept and detailed design of e-Pumps for Data centre applications. Ability to work from 1 st principals in concept design work utilising problem solving skills Work alongside engineering team to ensure design is optimised for manufacture To liaise with design team & Chief Engineer to resolve design issues. Create CAD...
IR35 Status:
Outside IR35

CV-Library Birmingham, UK Contractor
CL
Jul 16, 2026  
Senior CS&A Engineer
Due to continued growth are currently seeking Senior CS&A Engineers to join our team, these positions support hybrid working and can be based across our office network within the UK - Stockton, Newcastle, Bristol, Gloucester, and Westlakes. Role- Senior CSA Engineer Location- Stockton, Newcastle, Bristol, Gloucester, and Westlakes. Rate- £50-£65.00 per hour Inside IR35 As a Senior CS&A Engineer your responsibilities could include: Lead the development of civil and structural engineering designs and solutions across the full project lifecycle Prepare technical documentation, specifications, and design justifications for safety-critical systems Oversight, verification and preparation of safety case inputs, such as Safety Functional Requirements (SFRs), Structural Design Method Statements (SDMSs) and Design Substantiation Reports (DSR). Oversight, verification and preparation of Interpretive Reports, Basis of Design, Analysis Reports, Calculations, CDM documentation,...
IR35 Status:
Inside IR35

CV-Library Sellafield, Seascale, UK Contractor
CL
Jul 16, 2026  
Principal CS&A Engineer
Due to continued growth are currently seeking Principal CS&A Engineers to join our team, these positions support hybrid working and can be based across our office network within the UK - Stockton, Newcastle, Bristol, Gloucester, and Westlakes. Role- Principal CSA Engineer Location-  Stockton, Newcastle, Bristol, Gloucester, and Westlakes. Rate- £60-£75.00 per hour Inside IR35 As a Principal CS&A Engineer your responsibilities could include: Leading a team of CS&A engineers and architects in the definition, implementation and delivery of specified functional works that achieves safety, functional and business requirements. Key role holder within the Engineering team on the project. Delivery of the civil, structural, and architectural design. Manage the interface to and between key Delivery Partners and the design team. Understanding of the commercial implications of products, scope and packages Delivery of substantiation and other approvals. Risk identification...
IR35 Status:
Inside IR35

CV-Library Sellafield, Seascale, UK Contractor
CL
Jul 15, 2026  
Senior to Lead EICA Engineer (Design Biased) - Water Sector
We're supporting a growing engineering delivery partner working across multiple long-term UK water frameworks. Due to continued project wins, they are looking to hire Senior, Lead, and Principal EICA Engineers to strengthen their design and delivery capability. This is a genuinely flexible, remote-first role where you'll still stay close to delivery - attending key site visits, FATs, and collaborative sessions without the need for constant travel. You'll be joining a team trusted to deliver high-value, complex EICA solutions across the full project lifecycle - from early design through to commissioning. The Opportunity Depending on your level, you'll either: Support delivery of key EICA packages (Senior) Take ownership of workstreams and coordinate design (Lead) Or drive technical delivery and influence projects at a strategic level (Principal)All roles offer exposure to client-facing work, technical ownership, and real project impact across critical UK infrastructure. Key...
IR35 Status:
Unknown Status

CV-Library United Kingdom Contractor
CL
Jul 15, 2026  
Track Design Engineer
Track Design Engineer Overview We are seeking an experienced Track Design Engineer to support the delivery of railway infrastructure projects. The successful candidate will be responsible for producing high-quality track designs from concept through detailed design stages, ensuring compliance with industry standards and project requirements. Key Responsibilities Deliver track design packages at both Form A (Approval in Principle) and Form B (Detailed Design) stages. Produce all associated design deliverables including: Track alignment designs Design reports Technical calculations Drawings and CAD outputs Design assurance documentation Construction and installation support documentation Develop compliant track layouts, alignments, and geometry in accordance with Network Rail standards and client requirements. Coordinate with multidisciplinary teams including Civil, Signalling, Electrification, and Geotechnical disciplines. Participate in design reviews, technical meetings, and...
IR35 Status:
Unknown Status

CV-Library Birmingham, West Midlands Contractor
CL
Jul 15, 2026  
Site Agent - Civil Engineering
Site Agent – Civil Engineering Boyd Recruitment Boyd Recruitment are currently recruiting for an experienced Site Agent on behalf of one of our leading civil engineering contractors. This is a site-based role working on a range of infrastructure and civil engineering projects across Scotland, with the potential for working away from home depending on project location. This position would suit an individual currently operating at Site Manager / Agent / Sub Agent level, or someone ready to take the next step into a more senior site leadership role. The Role As Site Agent, you will be responsible for the safe, efficient, and commercially aware delivery of works on site. You will act as the Responsible Person, managing daily construction activities, coordinating site teams and subcontractors, and acting as a key point of contact between the client, engineer, and wider project team. Depending on project size and complexity, you may take full ownership of site delivery or support a...
IR35 Status:
Unknown Status

CV-Library Ayrshire, UK Contractor
CL
Jul 15, 2026  
Track Design Engineer
Track Design Engineer Overview We are seeking an experienced Track Design Engineer to support the delivery of railway infrastructure projects. The successful candidate will be responsible for producing high-quality track designs from concept through detailed design stages, ensuring compliance with industry standards and project requirements. Key Responsibilities Deliver track design packages at both Form A (Approval in Principle) and Form B (Detailed Design) stages. Produce all associated design deliverables including: Track alignment designs Design reports Technical calculations Drawings and CAD outputs Design assurance documentation Construction and installation support documentation Develop compliant track layouts, alignments, and geometry in accordance with Network Rail standards and client requirements. Coordinate with multidisciplinary teams including Civil, Signalling, Electrification, and Geotechnical disciplines. Participate in design reviews, technical meetings, and...
IR35 Status:
Unknown Status

CV-Library Birmingham, West Midlands Contractor
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