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Inside IR35 Contractor Windsor

134 jobs found in Windsor

CL
Mar 19, 2026  
Site Manager
Site Manager | 3 Month Initial Contract I'm currently recruiting for a Principal Contractor Site Manager (PCSM) role on a critical National Grid substation extension project. The project is in the Early Contractor Involvement (ECI) phase, with ongoing survey and investigation works. The scope includes 4SGT replacement, significant CV cabling works, and wider substation upgrades. A GIS building is planned for a later phase. The role is required urgently, as site activities are already underway. Key details: * Location: Ashford * Duration: 3 months * Schedule: Monday to Friday, 8am-5pm (45 hours per week) * Rate: £60 per hour * IR35: Inside Essential certifications: * National Grid Safety Instructions (NSI) 6 & 8 - Competent Person (in date) * Temporary Works Coordinator * CAT 1 & CAT 2 with Substation HV module * SMSTS * SHEA ersg are an equal opportunities employer; we are committed to promoting equality of opportunity for all job applicants. We do not discriminate...
IR35 Status:
Inside IR35

CV-Library Staines, Surrey Contractor
CL
Mar 18, 2026  
Project Manager
Freelance Project Manager – Substation Extensions (Inside IR35) We are seeking an experienced Freelance Project Manager to support the delivery of multiple substation extension projects within a regulated utilities environment. This is an Inside IR35 contract role, suited to a strong delivery-focused professional with a background in electrical infrastructure and civils. The Role You will take full responsibility for managing substation extension works from initiation through to commissioning and handover. The projects involve significant civils packages, coordination of multi-disciplinary teams, and strict adherence to safety and regulatory standards. Key Responsibilities - Lead the end-to-end delivery of substation extension projects (11kV–132kV or above). - Manage civils works including foundations, ducting, drainage, earthworks, and structural bases for plant and equipment. - Coordinate electrical and mechanical installation activities in live substation environments. -...
IR35 Status:
Inside IR35

CV-Library Staines-upon-Thames, UK Contractor
CL
Mar 13, 2026  
BIM Technician
BIM Technician (MEP) - Contract (6-9 Months)   Heathrow Airport Contract Position (6-9 Months) Day Rate - Competitive Day Rate   Company Info   My Client is a specialist MEP contractor delivering high-quality mechanical, electrical and public health installations across complex commercial, aviation and infrastructure projects. Due to ongoing works at Heathrow Airport, we are seeking an experienced BIM Technician (MEP) to support our project delivery team on a live aviation scheme.   Role Overview This is a contract position based at Heathrow Airport, supporting the coordination and delivery of MEP services within a live aviation environment. The successful candidate will be responsible for producing and managing coordinated 3D models, ensuring clash-free installations, and supporting site teams with accurate, buildable information. Experience working on airport or live infrastructure projects is highly desirable.   Key Responsibilities Develop, update and manage...
IR35 Status:
Inside IR35

CV-Library Hounslow TW6 1EW, UK Contractor
CL
Mar 13, 2026  
Medical Affairs Event Planner
Role: Medical Affairs Corporate Event Planner (Pharmaceutical Sector) * Location: Hybrid-working – Stockley Park, Uxbridge (3 days office / 2 days remote) * Length: 12-month contract * Rate: Market Rates (Inside IR35, via Umbrella) * Start Date: March 2026 (or ASAP) The Opportunity: ISR Recruitment are delighted to be supporting a leading global pharmaceutical organisation in their search for an experienced Medical Affairs and Corporate Event Planner to join their Meeting and Events team on an initial 12-month contract. This is an excellent opportunity for a highly organised and proactive professional with a background in pharmaceutical or healthcare event management to contribute to the compliant delivery of key Medical Affairs programmes, including Advisory Boards, departmental meetings and other high-profile healthcare professional (HCP) events. Skills, Qualifications and Experience: * Bachelor’s degree (or equivalent) with 4+ years’ experience in corporate...
IR35 Status:
Inside IR35

CV-Library Hillingdon, Greater London Contractor
CL
Feb 22, 2026  
Site Agent - Civils and Infrastructure
Site Agent - Civils (Heathrow Airport) 📍 Heathrow Airport 💼 Freelance / Contract 💷 Circa £500/day - Inside IR35 TRIbuild Solutions isare recruiting an experienced Site Agent from a civil engineering background to support a multi-faceted infrastructure package at Heathrow Airport. This is a hands-on role working across a range of complex civils activities within a live, highly regulated airport environment. Scope of Works Includes: Drainage Tunnel cladding / structural concrete works General civils & infrastructure packages Coordination of subcontractors and direct labour Temporary works, RAMS, permits & ITPs Daily site management, progress tracking and H&S compliance Key Requirements: Strong background as a Site Agent on civils projects Degree qualified background preferred Proven experience with drainage and structural / tunnel-related works Comfortable working in live or highly controlled environments SMSTS, CSCS (Black/Gold preferred) Excellent...
IR35 Status:
Inside IR35

CV-Library Feltham, London Contractor
CL
Mar 18, 2026  
Oracle DBA
Oracle Database Administrator (DBA) Contract Daily Rate: Up to £600 (Inside IR35 via umbrella) Contract Length: 6 months initially Location: Sindlesham, Wokingham (1 day per week onsite is required) Overview: Our client is seeking an experienced Oracle Database Administrator to provide essential support for Oracle and SQL Server databases within the estate. This role is vital in maintaining the systems that ensure operational continuity in the UK. As part of a dedicated DBA team, the successful candidate will be instrumental in managing an extensive Oracle database estate, ranging from legacy systems to modern deployments. Key Responsibilities: Provide 24x7 database management and administration expertise in high availability environments. Conduct proactive maintenance and monitoring of Oracle databases. utilise change, problem, incident, and release management tools effectively. Liaise with third-party service centres as necessary. Perform technical analyses and engage with...
IR35 Status:
Inside IR35

CV-Library Wokingham, Berkshire Contractor
CL
Mar 14, 2026  
Site Engineer - Nights / Days
Site Engineer: Night and Shifts **inside IR35** Are you an RC Site Engineer looking to work on a prestigious High Speed Project in West London? The job is 6 - 12 months working on Shafts and RC structures THIS ROLE IS ON A 11 HOUR SHIFT PATTERN - 5 days on, 2 off - 5 nights on 2 off Benefits: An opportunity to gain valuable experience on a prestigious Major project A chance to work for one of the busiest specialist contractors currently in the UK with lots of follow on work Roles and Responsibilities: Setting out and QA Ensure quality control requirements are met and recorded in accordance with specification Operate and promote a high standard of health and safety and environment compliance Raising of technical queries Ensuring that all materials used and work performed are as per specificationsCandidate Requirements: RC Structures or Shafts experience Civil Engineering Degree or equivalent Prepared to work shifts CSCS cardThink this is a job you may be interested in?...
IR35 Status:
Inside IR35

CV-Library Northolt, London Contractor
CL
Mar 15, 2026  
Embedded Systems Engineer
Copello are seeking an experienced Embedded Systems Engineer for a 3–6 month contract with a leading defence organisation based in Buckinghamshire. This is a technically challenging role within a highly regulated environment, supporting the development of advanced systems, ideally within an avionics or wider defence context. The successful candidate will combine strong hands-on embedded development expertise with the ability to lead and coordinate a small engineering team. This role is inside IR35 and requires candidates to be eligible for SC clearance. Key Responsibilities * Lead and manage a small embedded systems engineering team, providing technical direction and oversight * Design, develop and debug embedded software for ARM-based SoCs * Develop and maintain secure boot chains and low-level board support packages * Work across bare-metal and RTOS environments * Support integration, verification and validation activities within a defence framework * Perform...
IR35 Status:
Inside IR35

CV-Library High Wycombe, Buckinghamshire Contractor
CL
Mar 05, 2026  
Programme Planner
We are currently looking for a Programme Planner for a company in Buckinghamshire on a contract basis. Please see the details below. Overview We are seeking an experienced Programme Planner / Programme Controls professional to support complex engineering programmes within a fast-paced, high-tempo environment in a Defence company. This is a dynamic contract role requiring strong autonomy, senior stakeholder engagement, and hands-on delivery across planning, controls, and reporting. Key Responsibilities * Own and manage programme schedules using Primavera P6, ensuring accuracy, robustness, and alignment with delivery objectives * Maintain and manage the Integrated Management System (IMS) across complex engineering programmes * Potentially run daily stand-ups and planning meetings with VP-level stakeholders * Provide clear, concise programme reporting to senior leadership * Support customer-facing activities where required * Identify risks, dependencies, and critical path...
IR35 Status:
Inside IR35

CV-Library High Wycombe, Buckinghamshire Contractor
CL
Mar 20, 2026  
Project Engineer
Job Title: Project Engineer - Civil Location: Acton Contract Type: Contract (Inside IR35, via Umbrella only) Duration: Ongoing long-term project We're seeking an experienced Project Engineer with a strong background in design management to support a major UK infrastructure project. This role suits someone who enjoys taking ownership of technical delivery and coordinating design interfaces across multiple disciplines. Key Responsibilities Manage and review design deliverables, ensuring alignment with project specifications and standards. Coordinate between design teams, contractors, and stakeholders to resolve technical queries. Support project planning, design assurance, and change control processes. Oversee technical quality, construction feasibility, and compliance with design intent. Contribute to risk reviews, constructability assessments, and progress reporting. Key Requirements Minimum 5 years' experience as a Project Engineer in civil engineering or MEP projects....
IR35 Status:
Inside IR35

CV-Library Acton, London Contractor
CL
Mar 20, 2026  
Project Manager
Project Manager Reading 6-Month Contract Paying up to £88p/h (Inside IR35) Due to the nature of the role, you will need to hold or be eligible to obtain a high level of UK security clearance. Please only apply if suitable Key Responsibilities: Clarify and document business requirements to ensure project plans are comprehensive, realistic, and in line with companyobjectives. Develop projections for capital and expense resource planning to advise management on budgetary issues. Assess business prospects in line with company policies and procedures to ensure they are accurately documented and represented in project plans. Communicate project plans and progress across the business to ensure all stakeholders are briefed and up to date. Summarize salient planning and schedule progress to provide advice and make recommendations for consideration by senior levels within the organization. Lead and develop a team of people, delivering a project office management service or a small...
IR35 Status:
Inside IR35

CV-Library Reading, Berkshire Contractor
CL
Mar 19, 2026  
Regulatory Affairs Specialist
TalentMark is recruiting for a Regulatory Affairs Specialist to join a company in the Pharmaceutical industry, at their site based in Reading, on a contract basis initially for 4 to 6 months. Salary: £50.75 per hour PAYE or £68.89 per hour Umbrella (inside IR35) Regulatory Affairs Specialist Role: Ensures the success of new product registrations, line extensions and new indications and claims in alignment with the business plan. Manages the coordination, compilation, submission of new drug applications, cosmetics, medical devices, and food supplements. Assesses the acceptability of quality, preclinical and clinical documentation for submission filing. Monitors the progress of the regulatory authority review process through appropriate communication with the Health Authority.Your Background: Hold a relevant scientific degree or have equivalent working experience. Experience with local UK/IE affiliates, Direct engagement with authority MHRA and HPRA. knowledge of OTC...
IR35 Status:
Inside IR35

CV-Library Reading, UK Contractor
CL
Mar 14, 2026  
Senior Finance Manager - SC
Job Title: Senior Finance Manager - SC Location: Green Park, Reading (3 days on site) Contract Duration: 18 Months Daily Rate: £72.66 -  £77.20/hr (Umbrella – Maximum) IR35 Status: Inside IR35 Security Clearance: SC & British citizenship Minimum Requirement: Strong budgeting experience Strong reporting experience Strong stakeholder management skills at all levels – internal and external Reporting to senior stakeholder MOD/Defence experience Various Analysis Public sector Experience of executive reporting Strong accounting experience Oracle fusion/ERP system – Highly desirable not essential Transformation experience – desirable Oracle Fusion EPBCS – Highly desirable but not essential Security Clearance: SC Key Accountabilities: Manage and deliver all financial activities as assigned to time, cost and quality. Develop and deliver functional strategy and drive delivery of objectives. Line managing and task managing as appropriate in accordance with company policies, processes...
IR35 Status:
Inside IR35

CV-Library Reading, UK Contractor
CL
Mar 13, 2026  
Data Analyst
£200 + VAT per day 6‑month Contract (Inside IR35) - Umbrella only Reading, Berkshire, UK - Fully remote (Work from home!) Your new company We're supporting a nationally recognised charity whose work changes lives every day. They are investing heavily in modernising their digital and data landscape, strengthening the systems and intelligence that underpin their services. Their CRM platform, functionally similar to Blackboard, is central to how they operate, and they are now enhancing their data capability to ensure accuracy, governance and insight at scale. This is an environment where your technical expertise will directly support a mission with real social impact. Your new role This is a role for someone who wants to be at the centre of a complex, high‑value data ecosystem. You'll be the person the organisation turns to when clarity, precision and technical depth are needed. Using your SQL and scripting expertise, you'll interrogate datasets, diagnose issues at source, resolve...
IR35 Status:
Inside IR35

CV-Library Reading, Berkshire Contractor
CL
Jan 21, 2026  
HR Business Partner
HR Business Partner (Reading, Hybrid) Certain Advantage are recruiting on behalf of our established International Technology client in Reading for an HR BP on an initial 6 month contract (inside IR35 with option of PAYE via an Umbrella or our PAYE payroll). As an HR Business Partner for the UK business your purpose will be to drive the people strategy through providing strategic advice and support across the employment lifecycle. This is a fantastic opportunity to work with an established global organisation in supporting the UK business, acting as a trusted partner on matters of compliance, development, workforce planning and employee relations. You’ll work in close partnership with Functional HRBPs, the Global HR Answers team and other HR related stakeholders such as TA, Payroll and Comp & Bens; providing detailed advice and problem resolution on complex and sensitive HR policy interpretation and procedural issues. What we need from you Experience & Qualifications...
IR35 Status:
Inside IR35

CV-Library Reading, UK Contractor
CL
Mar 13, 2026  
Site Manager
New Opportunity for a Site Manager in Cricklewood! Role: Site Manager (Shafting/Tunneling)- Thames Water Project (Location: Cricklewood Rate: £475 p/d (Inside IR35/Umbrella PAYE) Duration: 18 Months+ (Ongoing) Sector: Water/Wastewater Bias: Civil Engineering (Shafting/Tunneling) Are you an experienced Site Manager with expertise in shafting or tunneling? Join us in Cricklewood for a prestigious Thames Water pumping station project! About the Role: As a Site Manager, you will be a key player in delivering a major pumping station refurbishment project. Located at the Cricklewood Pumping Station, a site with significant recent works, your role will involve overseeing the installation of upgrades to the pumping infrastructure, structural repairs, and various other site enhancements. You will also manage shafting and tunneling works as part of this critical upgrade for Thames Water. Key Responsibilities: ·Lead and manage site teams in delivering a complex Thames Water...
IR35 Status:
Inside IR35

CV-Library Cricklewood, London NW2, UK Contractor
CL
Mar 20, 2026  
Project Manager (Windows 11 Migration)
Project Manager – Windows 11 Migration & Laptop Refresh £550 per day | Inside IR35 | Contract - 8 month rolling We are looking for an experienced Project Manager to lead a Windows 10 to Windows 11 migration and laptop refresh programme for approximately 2,500 users for an 8 month contract to be based in Morden. Ideally the chosen candidate will have public sector experience and recently delivered a project of this nature. A delivery partner has already been engaged to design and build the Win11 / Intune environment, with device personas defined. Your role will be to drive end-to-end delivery, governance, stakeholder engagement, and successful rollout across the organisation. Key Requirements Proven experience delivering Windows 10 to Windows 11 migrations Experience managing large-scale device refresh programmes (1,000+ users) Strong understanding of Microsoft Intune / Modern Workplace environments Public sector experience is essential (local government highly desirable)...
IR35 Status:
Inside IR35

CV-Library London Borough of Merton, UK Contractor
CL
Mar 18, 2026  
Pre-Construction Project Manager
Pre-Construction Project Manager – Basics * Role: Pre-Construction Project Manager * Organisation: Essex * Rate: £450 per day * Contract Length: 12 month contract (with the possibility of a further 12 month extension) * Working arrangements: 1–3 days per week * Start Date: As soon as possible * IR35: Inside IR35 Pre-Construction Project Manager – Overview * Looking for an experienced Pre-Construction Project Manager to join its Pre-Construction team to manage the pre-construction phase of its capital works programme. * The housing capital programme for investment work to occupied homes is in the region of £150m over the next 2 years. * The programme will deliver major refurbishment and component replacement projects at speed and scale to occupied council homes, including low- and high-rise blocks within the context of The Construction (Design and Management) Regulations 2015 and Building Safety Act 2022. * Partnering with internal and external...
IR35 Status:
Inside IR35

CV-Library United Kingdom Contractor
CL
Mar 18, 2026  
Rail CEM
Are you a CEM with previous experience working on major projects? Are you looking for your next ongoing contract? We are supporting a leading contractor delivering works on HS2, one of the UK's largest and most complex rail infrastructure schemes. This is an opportunity for an experienced CEM to step into a major project environment, replacing an existing contractor and providing strong engineering leadership across rail systems works. Location: Old Oak Common, London Working arrangements: Hybrid working, 1/2 day WFH Rate: £550pd (inside IR35) Duration: Ongoing Responsibilities: ·Act as Contractors Engineering Manager (CEM) under NR/L2/RSE/02009 ·Lead engineering assurance and integration across multidisciplinary rail packages ·Interface with HS2, principal contractors, designers and key stakeholders ·Oversee technical governance, design approvals and compliance ·Support delivery across complex, high-value infrastructure works Requirements: ·Proven experience operating...
IR35 Status:
Inside IR35

CV-Library Greater London, UK Contractor
CL
Mar 20, 2026  
Senior Service Designer
Are you a senior Service Designer with experience working within the Public Sector? If so, I have an exciting opportunity for you within the public sector. I am working with a firm who are looking to bring on a Senior Service Designer on a contract basis, the role would run until the end of October initially (around 7/8 months) and would be inside IR35 with a rate of between £600-£700 p/d. This be would hybrid with 1 day a week on site and can work out of their London, Cardiff or Glasgow Offices Requirements * Professional experience in service design (lead criteria) * Professional experience of working with Interaction Design, Content Design and User Research (lead criteria) * Demonstrable experience designing systems for use across multiple services, and identifying the simplest of a variety of approaches * Ability to make and justify decisions characterised by high levels of risk, impact and complexity * Ability to prioritise and mitigate design constraints *...
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
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