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Contractor 42
Engineering Outside IR35 Marlow

42 jobs found in Marlow

CL
May 01, 2026  
Civil 3D CAD Technician
Civil 3D CAD Technician - Contract or Permanent We are seeking an experienced Civil 3D CAD Technician to support the delivery of UK infrastructure projects, with a focus on water and wastewater schemes. Key Details: Contract (£30-35 p/h, Outside IR35) or Permanent Hybrid working - 2 days per week in Slough Immediate start preferredKey Responsibilities: Produce high-quality drawings and models using Civil 3D Support design of drainage systems, pipelines, and rising mains Collaborate with engineering teams on water and wastewater infrastructure projectsRequirements: Proven experience with AutoCAD Civil 3D Strong background in drainage and pipeline design Experience working on UK infrastructure projects Ability to travel to Slough 2 days per weekThis is a great opportunity to work on impactful infrastructure projects within a dynamic and growing team. Apply now to find out more. We are an equal opportunity employer and value diversity in our company. We do not discriminate on...
IR35 Status:
Outside IR35

CV-Library Slough, Berkshire Contractor
CL
Apr 23, 2026  
Project Manager REF6084H
Project Manager x2 Reading (hybrid - 4 days from home) Outside IR35   Certain Advantage are recruiting on behalf of our established Engineering client for a Project Manager on a contract basis to support important defence projects in the UK.   They require two Project Managers to support the initiation of projects and programmes using Portfolio Entry controls and structured business case development methods.   Some of your responsibilities: Analyse and break down complex problems to develop strategic proposals for Investment Approval Coordinate pre-Concept studies to explore business problems and opportunities Develop early understanding of solution options to inform decision-making Produce initial estimates for scope, schedule, and cost ranges Recommend appropriate delivery methodologies for proposed initiatives Secure approvals to proceed, including Standing Approval and initial resource allocation Ensure alignment of proposed projects and programmes with overall portfolio...
IR35 Status:
Outside IR35

CV-Library Reading, UK Contractor
CL
May 01, 2026  
Contract FPGA Design Engineer - VHDL
The Redline Group are working in collaboration with a leading designer in specialised instrumentation to secure the services of a Contract FPGA Design Engineer - VHDL to work on-site at their offices near Staines. Commutable from Windsor, Leatherhead and the surrounding areas, this is an initial 3-month opportunity where you will assist in the re-design of key electronics. Our client has been designing cutting-edge equipment used in a range of industries for many years, focusing on technology which not only provides safety, but will allow analysis and monitoring. You will join a small design team who have been tasked with a re-design project, creating a secure and robust product which will be in use for years to come. This role has an indicative OUTSIDE IR35 determination therefore we can accept candidates who would like to operate through their own PSC. Key Skills Required - Contract FPGA Design Engineer, Staines: - Proven experience of FPGA development, in particular the...
IR35 Status:
Outside IR35

CV-Library Staines, Surrey Contractor
CL
Apr 25, 2026  
Senior Electrical Engineer - Nuclear
Senior Electrical Engineer - Infrastructure Projects AWE, Berkshire Hybrid - 2 days per fortnight on site £55-60/hour - Outside IR35 (pending determination) Security Clearance: SC required (DV eligibility essential) About the Opportunity We are currently recruiting for a Senior Electrical Engineer to support delivery across the One Team Framework on high-profile defence infrastructure projects. This is an excellent opportunity to work on technically complex, highly regulated programmes, contributing to the design and delivery of critical electrical infrastructure across a secure environment. You'll play a key role in ensuring safe, compliant, and high-quality engineering solutions within a collaborative, multi-discipline team. The Role As a Senior Electrical Engineer, you will lead the design and delivery of electrical infrastructure systems, with a focus on HV/LV power distribution, substations, and associated networks. You will take ownership of engineering outputs...
IR35 Status:
Outside IR35

CV-Library Aldermaston, Berkshire Contractor
CL
Apr 26, 2026  
Power Electronics Engineer
Power Electronics Engineer Contract: 6 months initial, Outside IR35, Oxford, 2 days per week Rate: £60-80 per hour Project Scope The Power Electronics Engineer will be responsible for the design, development, and validation of power electronic systems for advanced electrification applications in harsh environments. The role spans the full development lifecycle, from concept and topology selection through simulation, prototyping, and testing, working closely with multidisciplinary engineering teams. Technical Scope * Design and develop power converters (AC-DC, DC-DC, DC-AC) across a range of power levels (100kW+). * Evaluate and implement suitable converter topologies (flyback, boost...etc) and validate designs through simulation. * Develop power electronic drive systems for electric motors, including sensorless control approaches where applicable. * Design switching power supplies. * Investigate and address key challenges related to system electrification, including...
IR35 Status:
Outside IR35

CV-Library Oxford, Oxfordshire Contractor
CL
May 01, 2026  
Senior EC&I Engineer
Senior EC&I Engineer | North West (Hybrid Working) | up to £58ph | 4 day working week | Outside IR35 The Opportunity Are you at the point where you want more influence over engineering decisions, not just another delivery or design‑only contract? This is a senior EC&I contract working on complex, safety‑critical programmes within highly regulated environments such as defence and nuclear. The role operates at consultant level, giving real influence over technical decisions rather than being limited to a pure design function. You’d have ownership across the full lifecycle — providing technical leadership, assurance, integration support and problem‑solving through delivery — on an Outside IR35 basis with hybrid working and long‑term programme stability. It’s an opportunity to shape standards and outcomes, working closely with clients and multidisciplinary teams, rather than just executing instructions. What we’re looking for: Strong background in EC&I, control...
IR35 Status:
Outside IR35

CV-Library 42 Lyndale Ave, London NW2 2QA, UK Contractor
CL
Apr 29, 2026  
Site Agent
Site Agent – Contract – Up to £425/day – Guildford Are you a hands-on Site Agent or Senior Site Agent with Tier 1 experience? Do you thrive on taking ownership of complex water treatment projects from day one? If you’re ready to make a real impact on an early-stage AMP 8 upgrade, this could be the perfect contract for you. This role is potentially outside IR35 (Subject to determination), offering a 12-month plus contract, working on a chemical dosing / water treatment upgrade. You’ll be joining a small but experienced team at the start of the project, giving you real influence over site delivery and performance. What’s on offer: Up to £425/day Immediate start, 12-month plus contract Work on a high-profile AMP 8 water treatment upgrade project Opportunity to join the project from the start and shape delivery Hands-on role with responsibility for Civil, Mechanical, and Electrical works The Role: You’ll manage day-to-day site operations, including programme, quality, health...
IR35 Status:
Outside IR35

CV-Library Guildford, UK Contractor
CL
Apr 26, 2026  
Electronic Design Engineer (Camera & Vision Systems)
CONTRACT Electronic Design Engineer – Camera/Vision Systems (Remote contract – Outside IR35 - £50-55) (remotecontract) I am looking for a hands-on hardware design engineer to build camera systems from the ground up for advanced sensing applications for unmanned vehicles. Key Responsibilities Design CMOS & LWIR (thermal) camera systems Develop multi-layer PCBs (6 layers, controlled impedance) (core skill) Work across digital, mixed-signal & high-speed design (MIPI, LVDS) Interface sensors with FPGAs and frame buffer memory Design Ethernet/USB interfaces Support bring-up, debugging & validation Requirements Strong PCB design & high-speed experience Proven camera/imaging background (CMOS LWIR essential) Experience with FPGA (VHDL/Verilog) interfacing & Ethernet design Desirable CMOS experience with Teledyne/Octopus Must have UK right to work (BPSS eligible) If you are immediately available please send me a message or email me your cv
IR35 Status:
Outside IR35

CV-Library Newbury, Berkshire, South East Contractor
CL
Apr 29, 2026  
Structural Engineer
Structural Engineer Initial 3 Month Contract Hybrid - 3 days on site Leatherhead, Surrey £58.00 Per Hour (Outside IR35) The Role * As a Technical Advisor - Offshore structural, you will support the lead engineer related preparation of engineering deliverables within the scope assigned: * Design basis, material and construction specifications * Independently perform engineering analyses for operational (in-service) phase (in-place, fatigue), non-operational phase (loadout, transportation, lifting) and accidental phase (blast, fire, dropped object) for brownfield projects. * Perform detailed design of equipment supports, access platforms etc. * Review analyses/ calculations performed by others, provide technical guidance and proactively resolve any discrepancies * The work will involve liaising with other disciplines, the client, and 3rd-party contractors, and coordinating with project team members across global offices to deliver tasks within allotted timelines and budgets. The...
IR35 Status:
Outside IR35

CV-Library Leatherhead, Surrey Contractor
CL
Apr 03, 2026  
Pipe Stress Engineer
Pipe Stress Engineer Location - Leatherhead Work pattern – 4 days office – 1 day remotely. Rate - £60 p/hr – Outside IR35 Duration – 6 months Start - ASAP Job Responsibilities: During Detail Engineering, perform Piping Stress Analysis of high temperature piping systems using a combination of practical experience and commercially available software. Implement project specifications. Work as part of a team to ensure Isometrics are being checked in a timely manner Ensure a consistent and compliant approach to project execution. FEA Analysis of specialist piping components. Analysis of new and existing piping systems on Greenfield and Brownfield Projects. Work individually or as part of a team in the home office and abroad. Communicate effectively with other engineering disciplines. Committed to multi-centre project execution. Adhere to the companies WAY engineering standards and procedures as well as provide input to their development and enhancement. Skills / Experience:...
IR35 Status:
Outside IR35

CV-Library Leatherhead, UK Contractor
CL
Apr 30, 2026  
Interim Maintenance manager
Maintenance Manager (Interim) £450 - £500.00 daily rate plus expenses  (Outside IR35) 4 on 4 off DAYS Location: Commutable from Wembley, London The Profile We are seeking an experienced Maintenance Manager to ensure the smooth and efficient running of the Engineering Department on an interim basis. The successful candidate will have: This is a hands on engineering role ·A recognised engineering apprenticeship or relevant engineering qualification ·Proven experience within food manufacturing or a process-driven production environment ·Strong knowledge of Planned Preventative Maintenance (PPM) systems and implementation ·Experience managing quality standards and reducing waste ·A proactive, hands-on leadership style with a focus on continuous improvement ·Strong organisational and problem-solving skills The Role Reporting to the Head of Engineering, the Interim Maintenance Manager will be responsible for: ·Providing strong leadership and man-management to a small team...
IR35 Status:
Outside IR35

CV-Library Greater London, UK Contractor
CL
Apr 29, 2026  
Senior Civil Engineer
Contract Senior Civil Engineer (Building Drainage / Part H) 📍 London | Hybrid / Flexible 💰 £45–£55 per hour (Outside IR35) 📅 12-Month Contract A leading, design-led engineering consultancy, is looking to appoint an experienced Senior Civil Engineer on a long-term contract basis. This is a fantastic opportunity to work on a diverse portfolio of high-quality building-led projects across residential, commercial, and mixed-use developments. The Role You’ll play a key role in delivering building drainage and infrastructure design, working closely with structural teams, architects, and external stakeholders. Your focus will be on ensuring designs are fully compliant with Building Regulations Part H, from concept through to construction. Key Responsibilities Design of building drainage systems (foul & surface water) Ensure compliance with Part H Building Regulations Production of drainage strategies and detailed design packages Coordination with architects and...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 29, 2026  
Mechanical Engineer
Job Title: Intermediate/Senior Mechanical Engineer - 12 Month Contract or Permanent Location: Mostly remote (occasional travel to London) Contract Rate: £45-£53 per hour outside IR35 or Permanent Salary: £50-£60k About the Role: We are seeking an experienced Mechanical Engineer to join a dynamic team focused on innovative engineering solutions in the water and environmental sector. This role offers the flexibility of primarily remote work, with occasional visits to the London office, and provides the opportunity to work on cutting-edge projects in a collaborative environment. Key Responsibilities: Design, develop, and optimise mechanical systems and components. Prepare detailed engineering drawings, specifications, and documentation. Work closely with project teams to deliver solutions from concept through to installation and commissioning. Support project planning, risk assessment, and troubleshooting mechanical issues. Ensure compliance with relevant industry standards,...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 29, 2026  
Senior Quantity Surveyor
Job Title: Senior Quantity Surveyor (Freelance) Location: Central London & Stansted Airport Contract Type: Freelance Contract (Outside IR35) Rate: £400.00 – £450.00 per day Company Overview We are recruiting for experienced Senior Quantity Surveyors to support the delivery of works within an Asset Intelligence team for a leading Tier 1 contractor. These roles sit across two key projects within high-profile environments, offering exposure to complex M&E, security, and infrastructure-related works. This is an excellent opportunity to join a well-established team delivering critical upgrade and maintenance projects across major UK assets. The Role As a Senior Quantity Surveyor, you will play a key role in the commercial management of projects across two locations: Central London and Stansted Airport. This is a hands-on role requiring strong NEC contract knowledge and the ability to operate within a Tier 1 environment. You will be responsible for managing commercial...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 26, 2026  
BMS Commissioning Engineer - Trend OR Tridium
Ready for your next BMS contract? If you're a skilled BMS Commissioning Engineer with strong Trend or Tridium experience, I'm working with a well-respected industry leader on a range of exciting commercial upgrade and installation projects across London. This is a fantastic opportunity to get stuck into varied, technically engaging work with a company that values expertise and delivers high-quality projects. Role: BMS Commissioning Engineer 6-Month Contract (potential to extend) Variety of new installs and upgrade projects Outside IR35 Daily rate: £350 - £400 per day DOE Central London You'll be involved in: Full BMS commissioning across multiple sites Main Plant Commissioning to DesOps Secondary Commissioning High-level integration (BACnet & Modbus) Metering, point-to-point and point-to-graphic Functional testing and software modifications Client Witnessing Working with Trend (IQ4/5's) or Tridium (iSMA/JACE) What we're looking for: Proven BMS commissioning...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 26, 2026  
BMS Commissioning Engineer - EcoStruxure/Struxureware
Ready for your next BMS contract? If you're an experienced BMS Commissioning Engineer looking for your next exciting role, I've got a fantastic opportunity based in the heart of London. This is a long-term project with a forward-thinking client, offering interesting, varied work and the chance to make a real impact. Role: BMS Commissioning Engineer 📅 12-Month Contract (with strong potential to extend) 💼 Outside IR35 💷 Daily rate: DOE 📍 Central London You'll be involved in: Hands-on BMS commissioning across high-profile projects Integration work via BACnet & Modbus New installations from start to finish Point-to-Point / Point-to-Graphic Software modifications and metering Functional testing Working extensively with Schneider EcoStruxure What we're looking for: Strong commissioning background within BMS Proven Schneider EcoStruxure experience Confident in delivering quality work independently and as part of a team Experience Commissioning Main Plant (FCU's,...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 26, 2026  
BMS Service Engineer - Trend OR Tridium
Are you looking for your next BMS Service contract? I'm currently partnering with a growing, medium-sized controls specialist in London who are looking for an experienced BMS Service Engineer to join them on a new contract. This role will give you a varied workload - from planned maintenance (PPM) to small works commissioning - all within the London area. Role: BMS Service Engineer 📅 6-Month Contract (with extension potential) 🚀 Immediate start available 💼 Outside IR35 💷 Daily Rate: DOE 📍 Based in London What you'll be doing: Planned Preventative Maintenance (PPM) on BMS systems Fault finding, diagnostics, and remedials Carrying out upgrades and small works commissioning Working with Trend and/or Tridium systems Ensuring systems are optimised and operating efficiently What we're looking for: Proven BMS service/maintenance background Strong fault-finding and problem-solving skills Hands-on commissioning experience for small works Trend and/or Tridium expertise If...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 25, 2026  
Civil Design Engineer
Civil Design Engineer | Water Sector Contract: Long‑term, Outside IR35 Location: London (Flexible Hybrid) Our client in water is seeking an experienced Civil Design Engineer to support the design and delivery of infrastructure and non‑infrastructure projects across a broad programme of work. This long‑term contract offers the opportunity to play a key role in developing, reviewing, and coordinating civil engineering designs within a fast‑paced, essential services environment. Hybrid working is available, with regular presence required at the London office.  Key Responsibilities Produce, review, and develop civil engineering designs for water and wastewater infrastructure Prepare design calculations, technical drawings, and specifications in line with industry and regulatory standards Support feasibility assessments, optioneering, and early‑stage technical input Work collaboratively with multidisciplinary teams including process, mechanical, electrical, and delivery functions...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 25, 2026  
Senior Civil Engineer
CONTRACT SENIOR CIVIL ENGINEER – LONDON 🚧 📍 London (Hybrid Working) 💷 £40–£48 per hour – Outside IR35 📅 Long-term contract opportunity We’re working with a well-established civil engineering consultancy that is looking to bring in an experienced Senior Civil Engineer to support a strong pipeline of residential and commercial development projects. This is a great opportunity for someone who enjoys hands-on design work and wants flexibility with hybrid working. 🔧 The Role You’ll be involved in delivering infrastructure and drainage design across a range of development schemes, including: • Flood Risk Assessments • Drainage Schemes • SuDS Strategies You’ll play a key role in supporting project delivery from early feasibility through to detailed design and approvals. 💻 Software The team currently uses: • Civils 3D • Site 3D • InfoDrainage Experience in these is preferred, but not essential — strong drainage/infrastructure design experience is the priority. ✅ What...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 25, 2026  
BMS Commissioning Engineer
BMS Commissioning Engineer Central London 6-month subcontract contract | 40 hours per week | Weekly pay | Outside IR35 Schneider EBO commissioning work, live project, existing team, start ASAP If you are strongest when a project reaches the sharp end, this could suit you well. You’ll join an existing team on a Central London project and take on full BMS commissioning work, from installation testing and network testing through to software loading, full functional testing, and proving operation to the end user team. This is a subcontract role for someone who knows their way around Schneider StruxureWare and EBO, can get through commissioning properly, and does not need hand-holding to add value on site. You’ll be joining a leading BMS company with a strong project delivery history, which matters when you want a project that is properly structured and worth putting your name to. You’ll also be stepping into an existing project team, so this is not a case of being dropped into...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
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