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Contractor 35
Inside IR35 senior site engineer

35 senior site engineer jobs found

CL
May 09, 2026  
Analytics Engineer Power BI Developer
Position Analytics Engineer Power BI Developer Location Warrington, Cheshire (hybrid, not fully remote) Pay Rate £300 - £360 per day, PAYE (Inside IR35) Contract 12 Week Contract (Clearly Defined Project) Start Immediate Are you an Analytics Engineer / Power BI Developer with experience delivering clearly defined, transitional projects (not BAU)? Are you looking for a delivery-based project for a large UK Construction company that are a leading Tier 1 Main Contractor? The Role An exciting opportunity has arisen for an Analytics Engineer / Power BI Developer to play a key role in the way this organisation uses its data. Working closely with the Digital Lead and Technical Director, you will design, deliver and handover a single‑source integrated reporting solution by ingesting, transforming, and modelling data from multiple platforms, and presenting it through intuitive Power BI reports that support decision‑making across the business. The Company One of the UK’s largest...
IR35 Status:
Inside IR35

CV-Library WA5, Burtonwood, Warrington Contractor
CL
May 08, 2026  
Principal Software Quality Engineer
Principal Engineer - Software Assurance £65.98 p/hr - Inside IR35 12 months Defence 1-2 days a month on site, Coventry, Barrow, Frimley or Weymouth Our complex platforms are increasingly driven by Software, assuring the quality of this and the proper integration is critical to our success. Software assurance is the ongoing process to ensure that software products meet and comply with software engineering, quality and safety standards. It is a systems engineering activity that that supports the achievement of functional and multiple non-functional requirements and is applicable to the whole engineering lifecycle from concept design to in service support. This is a growing role within our business and industry with significant potential for development and further growth. We expect the candidate to quickly develop an understanding of the development, use and control of software in our complex and unique application. Being actively involved in the decision making and problem...
IR35 Status:
Inside IR35

CV-Library United Kingdom Contractor
CL
May 08, 2026  
Works Inspector
Infrastructure Protection – Works Inspector Business Area: Infrastructure Protection Project: Third Party / External Development Works (TfL Infrastructure Interface) Pay Rate £400 per day (inside IR35) – Umbrella About the Role We are seeking an experienced Infrastructure Protection – Works Inspector to join a busy operational team managing third-party and external development works adjacent to or above TfL infrastructure. You will be responsible for ensuring that construction activities do not compromise the safety, integrity, or operation of the rail network. This includes surveillance checks of safe systems of work, monitoring high-risk construction activities, and undertaking statutory network patrols under ROGS requirements. This is a highly site-based role with significant exposure to active construction environments and operational railway interfaces. Location Site-based role (London Underground / TfL operational infrastructure) You will be required to attend...
IR35 Status:
Inside IR35

CV-Library E20, Stratford and New Town, Greater London Contractor
CL
May 08, 2026  
Senior Mechanical Engineer (contract)
Senior Mechanical Engineer Basildon, Essex (1 day/week on site) £53ph (Inside IR35) Initial 6 month contract **Please note we can only consider sole UK Nationals for this role** We are currently looking for a Senior Mechanical Engineer to join the Precision Guidance Integrated Project Team (IPT), working on equipment for the next generation of Missile Seeker Programmes. What you'll do as a Senior Mechanical Engineer: 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...
IR35 Status:
Inside IR35

CV-Library Basildon, Essex Contractor
CL
May 07, 2026  
OT Engineer
We are looking for a OT Engineer for a consultancy to work in Warwickshire (3 days onsite per week) on a 6 month initial contract. Location: Warwick (minimum 3 days per week on-site) Day Rate: £400–£450 Inside IR35 Role Overview We are seeking a Senior OT Engineer with strong SQL scripting capabilities to support the National Grid SCADA transition programme. The role sits within a multi‑disciplined engineering team working alongside several National Grid partners. The successful candidate will contribute to the development, transition, and optimisation of operational technology systems within a critical national infrastructure environment. Key Responsibilities * Support OT engineering activities within the SCADA transition programme * Develop, maintain, and optimise SQL scripts and related data processes * Collaborate with cross‑functional engineering teams and external partners * Contribute to system transition planning, testing, and implementation * Ensure...
IR35 Status:
Inside IR35

CV-Library Warwick, Warwickshire Contractor
CL
May 07, 2026  
Senior Mechanical Engineer
6 month contract (initially) Up to £55.56 per hour umbrella (Inside IR35) Hybrid working (circa 1 day per week on site with a need to be flexible where required) Job Role: Our client is currently looking for a Senior Mechanical Engineer to join the Precision Guidance Integrated Project Team (IPT), working on equipment for the next generation of Missile Seeker Programmes. The successful candidate will be experienced in the Aerospace and/or Defence Industry and preferably hold SC Security status. The Mechanical Engineer role offers hybrid working, with the option of on-site working at our Basildon office. The frequency of on-site visits shall be agreed with the project team to ensure that key Milestones and Deliverables are met on time, to budget and to the desired quality. 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...
IR35 Status:
Inside IR35

CV-Library Basildon, 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  
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 01, 2026  
Senior Infrastructure Engineer
Senior Infrastructure Engineer £450 Per Day, Inside IR35 6-Month Contract Didcot, Oxfordshire Your new company We're supporting a nationally significant scientific research organisation recognised for delivering some of the most advanced and high-impact projects in the UK. Their digital platforms underpin cutting-edge experiments, secure collaboration and large scale data processing, and they rely on a modern, resilient infrastructure estate to keep these environments running safely and efficiently. As part of their ongoing investment in core services, they are seeking an experienced Senior Infrastructure Engineer to maintain, support and enhance their Microsoft 365, server, storage and authentication systems. This is a place where your technical expertise will directly contribute to work used across the UK science and innovation landscape. Your new role You'll take responsibility for the hands-on support and maintenance of both on-premise and cloud-based infrastructure....
IR35 Status:
Inside IR35

CV-Library Didcot, Oxfordshire 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
CL
May 01, 2026  
Senior Civil Design Engineer
Job Title: Senior Civil Engineer Day Rate: Up to £500 per day (outside IR35) Location: Manchester, with occasional site visits (expenses paid) Type: 12-month Contract | Full-time | Hybrid (1-2 days WFH possible for the right candidate) About the Role: You'll be involved in varied and high-impact projects across the regulated water industry, including: Sewage treatment works upgrades Clean water main replacements IED schemes at sewage treatment works CSO upgrades and storm storage solutionsThis is a chance to deliver technical excellence on essential UK infrastructure. About the Client: Our client is a respected engineering design consultancy working across the UK rail and utilities sectors. With a growing workload and strong reputation, they offer a supportive and collaborative team culture. Wellbeing is central to their values - they've created a safe, fair, and positive environment where people thrive. Key Responsibilities: Deliver high-quality civil engineering design...
IR35 Status:
Inside IR35

CV-Library United Kingdom Contractor
CL
May 01, 2026  
Senior LSAR Engineer
Senior LSAR Engineer Location: Filton, Portsmouth, or Broad Oak, 1-2 days on site per month Duration: 6 months Rate: £33.00 ph PAYE +£37.48 inclusive of holiday pay or £44.40 ph Umbrella Inside IR35 Role Description The individual in this role will be responsible for the following core engineering tasking: • Screening and integration of engineering information into the project-controlled toolsets, thereby helping to ensure the integration and accuracy of the ILS dataset is maintained. • Supporting alignment of the ILS dataset with third party datasets. • Investigating and responding to queries received by the project pertaining to the data held within our toolsets, as directed by the Project Manager / Helpdesk Lead. Core Duties Typical duties include (but are not limited to): • Screen engineering drawings to create a Product Breakdown Structure within the ILS toolset that is consistent with existing data held. • Integrate the engineering information...
IR35 Status:
Inside IR35

CV-Library Filton, Bristol, UK Contractor
CL
May 01, 2026  
Senior Systems Engineer
Senior Systems Engineer £87.83 per hour (Inside IR35) Mostly remote - 1-2 days per month on site, Barrow or Sheffield 12 months Senior Systems Engineer reporting to the Systems Engineering Function Lead within the Weapon Systems Engineering function. The role requires a good understanding of Model Based Systems Engineering (MBSE), Requirements management, Interface Management, Integration, and V&V stages of the Engineering Lifecycle. They should be experienced in working withal stakeholders including the internal project team, external customers, and the various design teams (S/W, Mech, Elec etc.). They should also be experienced in managing the engineering design stages: from the initial concept; design and development; testing and qualification; through to final manufacture and implementation of a new product or sub-system. Elicitation of user needs from internal/external customers. Elicitation of stakeholder needs across internal/external stakeholders. Elicitation of...
IR35 Status:
Inside IR35

CV-Library United Kingdom Contractor
CL
Apr 30, 2026  
Senior HV Cable System Design Engineer
Senior HV Cable System Design Engineer Locations: Epsom, Leeds, Birmingham or Glasgow Duration: 12 months initially Rate: Negotiable on experience Inside IR35 Are you passionate about shaping the future of energy? Our client, a leading player in the power industry, is seeking a Senior HV Cable System Design Engineer to join their expanding team. This is an exciting opportunity to work on high-profile transmission projects across the UK, contributing to innovative energy solutions. What you'll be doing: * Lead onshore and offshore HV cable FEED and detailed design works for major transmission projects. * Support business growth by engaging with clients, identifying opportunities, and assisting in bid and proposal development. * Collaborate with multidisciplinary teams, including civil, structural, and project management, to deliver comprehensive project solutions. * Attend site visits, coordinate with subcontractors and suppliers, and ensure project milestones are met. * Mentor...
IR35 Status:
Inside IR35

CV-Library Birmingham, West Midlands Contractor
CL
Mar 19, 2026  
Site Engineer
An inside IR35 contract role is available for a Setting out Site Engineer to support the delivery of a major £300 million reinforced concrete package on a cutting-edge carbon capture facility in Teesside. The position involves providing engineering expertise across several key structures, including the turbine hall, condenser plant, and carbon capture unit. Reporting to the Section Engineers, your key responsibilities will be to -   Work safely and in line with approved systems, raising any concerns around safety, environment, or quality. Proactively challenge unsafe practices and carry out safety observations when needed. Perform accurate setting out for complex concrete structures, earthworks, roads, and utilities. Support the Senior Engineers/Section Engineers with material take-offs, stock control, and order scheduling. Prepare Inspection and Test Plans (ITPs), ensure they’re followed, and brief relevant team members. Liaise with the materials team to monitor...
IR35 Status:
Inside IR35

CV-Library United Kingdom Contractor
CL
May 09, 2026  
Vehicle Package Engineer
Vehicle Package Engineer Department: Advanced Engineering Contract Type: Contract 12 months Location: Gaydon, Warickshire Rate: £33.88 per hour (inside IR35) Role Overview Vehicle Package Engineering sits within the Advanced Engineering department and is responsible for the vehicle package from concept through to end of life, across the client's full product portfolio. The team plays a critical role in balancing engineering requirements with customer needs, ensuring that all vehicle systems integrate effectively within the defined vehicle layout while protecting occupant and customer-use space. Due to continued project demand, the department is seeking talented and motivated Vehicle Package Engineers to support the delivery of challenging targets across a range of vehicle programmes. Key Responsibilities Creation of vehicle concept proposals through vehicle architecture and package layouts Development of outline component and system proposals to support package evolution...
IR35 Status:
Inside IR35

CV-Library Warwick, Warwickshire Contractor
CL
May 09, 2026  
Embedded Software Engineer (SC Cleared)
Bare Metal Embedded Software Engineer (SC Cleared) 6 Months Hybrid - 1-2 Days per week on site in Southampton £488 per day (Inside IR35) ***Please note - To be considered for this role, you need to hold active SC Clearance and be a Sole British National*** Overview We're working with a leading organisation in the defence and aerospace sector, seeking an experienced Embedded Software Engineer to support the development of next-generation airborne communication systems as part of a major UK programme. This is an opportunity to join a highly skilled engineering team working on cutting-edge, safety-critical technology. The Role You'll be involved in the development of software solutions for embedded, real-time, and safety-critical systems, contributing across the full software lifecycle. Key Responsibilities Develop software for embedded, real-time, and safety-critical applications Write and maintain high-quality, efficient code Contribute to system design and...
IR35 Status:
Inside IR35

CV-Library Southampton, Hampshire Contractor
CL
May 08, 2026  
Senior Automation QA Engineer (Data Engineering)
A leading organisation undergoing major investment in its data and engineering capabilities is looking for a Senior Automation QA Engineer to strengthen quality across complex, distributed systems. This role sits at the intersection of software engineering and data engineering, supporting the delivery of high‑quality services and reliable data products at scale. You’ll work closely with cross‑functional teams, driving automation, improving test maturity, and ensuring the accuracy and resilience of data pipelines and backend services. This is a hands‑on role suited to someone who enjoys ownership, technical depth, and influencing engineering best practice. Essential Skills & Experience Strong background in automation testing for microservices‑based architectures. Hands‑on experience building automation frameworks using Java or similar languages. Solid experience testing REST APIs, backend services, and service‑to‑service integrations. Proven experience validating data...
IR35 Status:
Inside IR35

CV-Library Remote Contractor
CL
May 08, 2026  
Senior Test Engineer - Lead
I am recruiting for a Senior Test Engineer to be based in Leeds, Birmingham, Manchester or Newcastle-Upon-Tyne 3 days per week, 2 days remote. Candidates must live close to one of the above sites. The role falls inside IR35 so you will have to work through an umbrella company for the duration of the contract. The Senior Test Engineer will have extensive Typescript and automation (functioning) experience. The candidates must have demonstrable leadership skills in driving change and will have managed/led a team. Your team leading experience must be clearly visible on your profile. Candidates will also have experience of non-functioning testing - either performance or accessibility. You will have a number of years of experience in software testing, with a focus on manual testing and test automation. You must be proficient in Java, Typescript and Javascript, with the ability to write and maintain test automation scripts. This experience must have been used in your most recent...
IR35 Status:
Inside IR35

CV-Library Leeds, West Yorkshire Contractor
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