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Inside IR35 senior mechanical design engineer

52 senior mechanical design engineer jobs found

CL
May 02, 2026  
Senior Mechanical Engineer
Senior Mechanical Engineer Basildon 6-Month Contract Paying up to £55p/h (Inside IR35 Key Responsibilities Support senior members of staff in the delivery of technical solutions on critical Business Programmes. Generation of mechanical solutions to relevant company and international standards. Design of engineering solutions taking into account all requirements including product quality, safety, reliability, testability, sustainability, etc. Mechanical engineering detailed design, including numerical calculations, tolerance studies, etc. Produce Manufacturing Data Packs in line with BS8888 including appropriate application of GD&T. Generate BoM within approve PLM system (Teamcenter). Contribute to reviews of Mechanical designs in accordance with business and industry standards. Deliver design solutions against Technical Requirements, within budget and timescales. Essential Skills & Experience Mechanical or Science degree qualified, or equivalent, with experience....
IR35 Status:
Inside IR35

CV-Library Basildon, Essex Contractor
CL
May 02, 2026  
Mechanical/Senior Mechanical Engineer- Nuclear
Mechanical Engineer / Senior Mechanical Engineer - Contract (Inside IR35) Warrington (Hybrid - 3 Days Onsite) £51-£56 per hour Long-Term Contract | Major Nuclear Programme - PFDO, Sellafield Are you a Mechanical Engineer ready to step into a high-impact role on one of the UK's most critical nuclear programmes? We're supporting a key delivery partner on the PFDO project at Sellafield, and we're looking for a Mechanical Engineer or Senior Mechanical Engineer to help drive engineering excellence across complex, safety-critical work. The Opportunity You'll play a vital role in delivering engineering and technical activities across the project lifecycle-bringing your expertise to solve complex challenges and ensure high-quality outputs in a regulated environment. This is a fantastic opportunity to work on a flagship nuclear programme, collaborating with experienced teams while contributing to the safe and efficient delivery of major works. What You'll Be Doing Deliver...
IR35 Status:
Inside IR35

CV-Library Warrington, Cheshire Contractor
CL
May 01, 2026  
Senior EC&I Designer
Senior EC&I Designer Location: Warrington (Hybrid Working) Rate: £53.00 – £65.00 per hour (Inside IR35) Hours: 40 hours per week Security Clearance: SC Clearance required Sector: Nuclear The Opportunity We are recruiting for a Senior EC&I Designer to support the delivery of complex nuclear engineering projects within a highly regulated environment. This is a key role where you will lead Electrical, Control & Instrumentation design activities, provide technical leadership to a multi-disciplinary team, and ensure high-quality, compliant design outputs across the full project lifecycle. Key Responsibilities Lead EC&I design activities across nuclear projects from concept through to detailed and production design Allocate and review work, ensuring all deliverables meet nuclear industry standards and regulatory requirements Produce and check EC&I design outputs, including: Schematics Wiring diagrams Loop diagrams Cable schedules General arrangements...
IR35 Status:
Inside IR35

CV-Library Warrington, UK Contractor
CL
Apr 30, 2026  
CRS6JP00014732, Job Posting Title: Senior Process Engineer
Senior Process Engineer 3 positions available Locations: Warrington or Bristol Working Pattern: Hybrid - 3 days per week on site Contract Length: 12 months IR35 Status: Inside IR35 Security Clearance: UK Security Check (SC) - required Start: Subject to clearance & onboarding The Role We are seeking experienced Senior Process Engineers to support a strategically important programme within the UK nuclear sector. This role will be supporting the technical development, assessment and delivery of process solutions associated with the handling, conversion, and potential reuse of reprocessed uranium originating from historic reprocessing operations. You will play a key role in process definition, safety justification, and technical assurance across the fuel cycle, working within a highly regulated nuclear environment. Key Responsibilities Lead and deliver process engineering activities across RepU-related systems and facilities Develop and review process flows, mass...
IR35 Status:
Inside IR35

CV-Library Warrington, Cheshire Contractor
CL
Apr 29, 2026  
Senior Design Engineer
Join a world-renowned aerospace organisation as a Senior Design Engineer in Gloucester on a hybrid basis Due to a drive for greater success, this advanced manufacturing business is currently searching for Senior Design Engineer to add to their talented, hardworking team in Gloucester on an initial 12 months contract. Striving for innovation and creativity you can ensure no two days will be the same. The rate per hour: £40.00 per hour inside IR35 / umbrella Role: Design and detail efficient landing gear systems for civil and military aircraft to meet demanding customer requirements Support the design and manufacturing of the landing gear systems Lead innovative mechanical design projects and ensuring robust, reliable, and cost-effective solutions across the product lifecycle Key responsibilities: Support all aspects of concept to detail design throughout the life cycle of our landing gear programmes Support all aspects of product configuration Ensure accuracy and...
IR35 Status:
Inside IR35

CV-Library Gloucestershire, UK Contractor
CL
Apr 26, 2026  
Senior HVAC Mechanical Engineer
12 Month Contract Rate open to negotiation up to £80 per hour umbrella (Inside IR35) Hybrid Working – 1 – 2 days per week on site (ideally) – can offer more remote working with ad hoc visits where required Job Role: The Senior HVAC Engineer will lead the design, integration, and technical assurance of numerous HVAC systems across a complex marine platform. They will apply deep expertise in system performance, capacity assessment, and optimisation to deliver robust, compliant, and customer focused solutions throughout the shipbuilding lifecycle. The role ensures high engineering standards by driving improvements to processes, supporting technical investigations, and providing evidence-based decision making. Strong HVAC and marine/building services systems experience is essential to ensuring system reliability and capability across the platform. Key Responsibilities: Preparing specifications and developing HVAC system designs in accordance with project requirements, technical...
IR35 Status:
Inside IR35

CV-Library Glasgow, UK Contractor
CL
Apr 23, 2026  
EC&I Senior Project Engineer
Job title: EC&I Senior Project Engineer Job Type: Contract IR35 Status: Inside IR35 Start date: ASAP Duration: 12 Month Pay rate: Depends on experience Location: Malton Hybrid/Remote Working: Onsite Hours of work: 37 hours Role information: A senior-level engineer responsible for delivering safe, compliant, and effective engineering solutions for complex industrial projects. The role involves leading the engineering aspects of projects from concept through to commissioning and handover, ensuring all work meets technical standards, safety regulations, and stakeholder requirements. * Define project requirements and develop engineering solutions * Produce and approve technical specifications and design * Manage and oversee detailed design and contractor work * Ensure compliance with safety, regulatory, and quality standards * Support project planning, execution, and risk management * Supervise construction, commissioning, and final handover * Maintain configuration control...
IR35 Status:
Inside IR35

CV-Library Malton, North Yorkshire Contractor
CL
May 06, 2026  
Project Manager (Cybersecurity)
Job Title: Project Manager (Cyber Security) Location: Durrington, West Sussex (Hybrid working arrangements, the office base will be Durrington (Worthing) office with occasional travel to other UK sites. The organisation work a hybrid working model with an expected 2 days minimum in the base office each week. Salary: £600 per day (inside IR35) Duration: 6-month assignment initially, with view for further extension to 1 to 2 years. We're seeking an IT Project Manager on behalf of our leading utilities company to lead the planning, delivery and governance of cybersecurity, high impact application, network and infrastructure projects across their digital organisation. The successful applicant will partner closely with various IT and business teams, as well as external vendors to ensure solutions meet Digital & Business needs for operability, performance, resilience and security. Key Responsibilities Define project scope, objectives, deliverables and success criteria in...
IR35 Status:
Inside IR35

CV-Library Worthing, West Sussex Contractor
CL
May 05, 2026  
Senior Process Engineer
Location: Warrington, Leicester or Bristol Hybrid working: 3 days/week in the office (some flexibility in this) Contract type: Permanent or Contract (inside IR35) Multiple positions available A leading engineering organisation is seeking experienced Senior Process Engineers to support the delivery of complex engineering and technical activities. This role is ideal for engineers with strong domain knowledge who can work independently, mentor others and contribute to high‑quality engineering outputs across a range of challenging projects. Role Overview: The Senior Process Engineer will manage and deliver engineering activities, applying specialist process knowledge to resolve technical issues, develop solutions and ensure compliance with relevant standards. You will work as part of a multi‑discipline team, supporting both project delivery and the development of less experienced engineers. Key Responsibilities Promote effective collaboration across engineering and wider functional...
IR35 Status:
Inside IR35

CV-Library Warrington, UK Contractor
CL
May 05, 2026  
Technical Group Integration Engineer
Technical Group Integration Engineer x 2 -  (phone number removed) / (phone number removed) - £27.30/hr umbrella rate Do you have strong technical knowledge of automotive systems and experience of making technical decisions in a fast paced automotive environment? Are you ready to accelerate your career and work on cutting-edge automotive projects? This is your chance to join a forward-thinking company as a Technical Group Integration Engineer. If you thrive in a fast-paced, innovative environment, then this opportunity is tailor-made for you. With a focus on integrating new technologies into vehicle architectures, this role offers a unique chance to make a real impact on the future of the automotive industry. You'll be at the forefront of engineering excellence, working alongside talented professionals who are passionate about delivering exceptional results. What You Will Do: - Drive the integration of new and existing vehicle architectures, ensuring compatibility with technical...
IR35 Status:
Inside IR35

CV-Library Gaydon, Warwick CV35, UK Contractor
CL
May 05, 2026  
Network Architect
Network Service Delivery Principal Location: Wokingham (3–5 days per week onsite) Start: ASAP Contract: 6 months initially Rate: £420 per day (Inside IR35) Overview Our client is seeking a visionary, highly technical Network Service Delivery Principal to lead the strategic design, evolution, and governance of a complex enterprise network estate. This is a senior, hands‑off architecture and leadership role. While engineering teams focus on delivery and operations, this position defines the network blueprint they build from—bridging business strategy and technical execution across on‑prem, cloud, and hybrid environments. You will architect scalable, automated, and secure network solutions spanning LAN, WAN (including SD‑WAN), cloud (AWS/Azure), and data centres, while driving the adoption of Network DevOps and Infrastructure as Code at an architectural level. Acting as a technical authority, you will guide senior stakeholders, mentor engineers, and ensure the network estate...
IR35 Status:
Inside IR35

CV-Library Reading, Berkshire Contractor
CL
May 02, 2026  
Interim Electronic Test Engineer
The Interim Electronic Test Engineer will support and lead all validation programs for electronic components/products, validating to key product specifications, supporting customers in the areas of research and development, new product introduction and VA/VE programs. Client Details The organisation is a well-established entity within the industrial and manufacturing sector, offering innovative engineering solutions. As a mid-sized company, they are committed to maintaining high standards and delivering excellence in their field. Description The interim Electronic Test Engineer responsibilities will include: Support preparation & selection of validation plans for electronic components based on the product specification. Execute multiple, complex, long duration tests designed to stress micro-electronic circuitry both thermally and mechanically. Support root cause analysis when failure mode is detected. Responsible for maintaining and setting up Laboratory tests to company...
IR35 Status:
Inside IR35

CV-Library Dewsbury, West Yorkshire Contractor
CL
May 02, 2026  
Engineering Coordinator
Location: Bridgwater site based - 3 days per week and 2 days remote working/satellite office Status: Contract - Inside IR35 Duration: Currently approved thro to 31dec26 (renewable) Reports to: JDO Area Lead Morson Edge are working on behalf of a major player within the Energy Sector who have a current (contract) requirement for an Engineering Coordinator, to join their established site-based team in Somerset. This is a uniquely interesting opportunity to contribute towards one of Europe's largest infrastructure/construction Projects. If you're looking for a challenge and have the enthusiasm and exceptional stakeholder management skills this role will require, this could be the role for you! The Opportunity As an Engineering Coordinator, you will ensure delivery of on-site engineering issues and changes within your designated area. You will be the driving force behind ensuring the successful completion of all pending tasks and construction updates within your assigned (site)...
IR35 Status:
Inside IR35

CV-Library Bridgwater, UK Contractor
CL
May 02, 2026  
Senior Substation Secondary Design Engineer
Senior Substation Secondary (P&C) Design Engineer Locations: Glasgow, Leeds, Birmingham or Epsom Duration: 12 months initially Rate: Negotiable on experience Inside IR35 Are you ready to make a real impact in the energy sector? Our client, a leading organisation in power and energy solutions, is seeking a talented Senior Substation Secondary (P&C) Design Engineer to join their dynamic team. This is a fantastic opportunity to work on high-profile projects, supporting clients like National Grid and SSEN across the UK and internationally. What you'll be doing: * Lead technical delivery of protection and control (P&C) design packages for substation projects, from Front End Engineering Design (FEED) to Detailed Design. * Provide technical guidance on protection schemes, relay settings, coordination, and substation automation. * Ensure quality assurance and governance of all design outputs, including SLDs, wiring diagrams, I/O schedules, and control room layouts. *...
IR35 Status:
Inside IR35

CV-Library Birmingham, West Midlands Contractor
CL
May 02, 2026  
Avionics Test Technician
Our client has an opportunity for an Avionics Test Technician to join them on a contract basis. You will be supporting the verification and validation of avionics systems. Role: Avionics Test Technician Location: Farnborough, fully onsite Hours: 37 hours per week Hourly Rate: £31.16 per hour via Umbrella, inside IR35 Clearance: BPSS required before starting What you'll be doing: The Avionics Test Technician will support the verification and validation of avionics systems. The role involves hands-on testing, fault finding, and close collaboration with engineering, manufacturing, and programme teams to ensure safe, repeatable, and high-quality test execution. Requirements: Previous experience in a test engineering or test technician role, ideally within aerospace, avionics, or a related engineering environment. Strong safety-first mindset, with a clear understanding of safe working practices. Familiarity with ESD control procedures and compliance with ESD-safe working...
IR35 Status:
Inside IR35

CV-Library Farnborough, Hampshire Contractor
CL
May 02, 2026  
Senior Substation Secondary Design Engineer
Senior Substation Secondary (P&C) Design Engineer Locations: Glasgow, Leeds, Birmingham or Epsom Duration: 12 months initially Rate: Negotiable on experience Inside IR35 Are you ready to make a real impact in the energy sector? Our client, a leading organisation in power and energy solutions, is seeking a talented Senior Substation Secondary (P&C) Design Engineer to join their dynamic team. This is a fantastic opportunity to work on high-profile projects, supporting clients like National Grid and SSEN across the UK and internationally. What you'll be doing: * Lead technical delivery of protection and control (P&C) design packages for substation projects, from Front End Engineering Design (FEED) to Detailed Design. * Provide technical guidance on protection schemes, relay settings, coordination, and substation automation. * Ensure quality assurance and governance of all design outputs, including SLDs, wiring diagrams, I/O schedules, and control room layouts. *...
IR35 Status:
Inside IR35

CV-Library Glasgow, UK Contractor
CL
May 02, 2026  
Network Engineer
6‑month Senior Network Engineer contract in Didcot, £480 per day, supporting a large, complex network estate for a major UK scientific organisation. £480 + VAT per day 6‑month Contract (Inside IR35) - Umbrella only Didcot, Oxfordshire, UK - Hybrid (3 days onsite, non‑negotiable) Your new company We're partnered with a nationally important research organisation whose work powers major scientific breakthroughs and supports a wide range of innovative programmes across the UK. Their network infrastructure is essential to enabling collaboration, high‑performance computing, data exchange and secure connectivity across multiple sites. With continued investment in their digital estate, they are now looking for a Senior Network Engineer to help maintain, secure and evolve the organisation's core network services. This is a role where your engineering expertise will directly contribute to research and infrastructure used on a national and international scale. Your new role You will be...
IR35 Status:
Inside IR35

CV-Library Oxford, Oxfordshire Contractor
CL
May 02, 2026  
Battery Test Delivery Engineer
Our OEM Client based in Gaydon, is searching for a Battery Test Delivery Engineer to join their team, Inside IR35. This is a contract position with a proposed end date of 31st March 2027. Umbrella Pay Rate: £27.03 per hour. The Opportunity: Using state-of-the-art facilities, you’ll provide the power behind our vehicles working in our Engineering Operations Powertrain team. The company has made a major investment in new testing capability to ensure future Powertrain development can take place and meet the business requirement to develop new and exciting products. The Battery Test Operations Team is part of Powertrain Test Operations within Product Engineering Operations. The team maintains productive test workflow for HV Battery development at our internal test labs at ABE Lyons Park (Coventry) and BatLab (Gaydon), delivering high quality electrical characterisation and performance data at cell, module and pack level. The team also supports HV battery activity at other internal...
IR35 Status:
Inside IR35

CV-Library Gaydon, Warwick CV35, UK Contractor
CL
May 01, 2026  
Autodesk Revit Designer (CS&A)
Senior Revit Designer - Civil, Structural & Architectural (CS&A) Contract | £36-£41/hour (Inside IR35) Warrington | Hybrid - 3 days per week in the office Security: Sellafield experience and existing PP Pass is essential. We are seeking an experienced Autodesk Revit Designer to support engineering design delivery within a highly regulated environment. This role will focus on the development and modification of Civil, Structural & Architectural (CS&A) and mechanical piping elements within a Revit model, supporting asset care and infrastructure upgrades. Working within a multi-disciplinary engineering team, you will contribute to the production of design deliverables including drawings, layouts, and engineering documentation, ensuring solutions are safe, compliant, and delivered to agreed time, cost, and quality targets. The role is primarily office-based in Warrington (3 days per week) with occasional site visits and travel to other offices when required. Key...
IR35 Status:
Inside IR35

CV-Library Warrington, Cheshire Contractor
CL
May 01, 2026  
Senior EC & I Engineer -Nuclear
Senior CE&I Engineer - Sellafield Projects Contract | £51-£56/hour (Inside IR35) Warrington | Hybrid - 3 days on site / 2 days remote Are you a Senior Control, Electrical & Instrumentation Engineer looking to apply your expertise within one of the UK's most complex nuclear environments? We are seeking a Senior CE&I Engineer to support a range of engineering and decommissioning projects across the Sellafield programme, delivering robust CE&I design and safety documentation within a highly regulated setting. This role offers the opportunity to contribute to nationally significant nuclear decommissioning work, supporting the delivery of safety-critical systems that underpin long-term hazard reduction at Sellafield. Key Responsibilities Deliver CE&I design work packages across a variety of nuclear engineering and decommissioning projects Produce and check design substantiation, safety documentation, and technical deliverables Provide expert CE&I input...
IR35 Status:
Inside IR35

CV-Library Warrington, Cheshire Contractor
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