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Contractor 36
Outside IR35 senior design engineer

36 senior design engineer jobs found

CL
Jun 28, 2026  
Senior HVAC Design Engineer
Data Centres are crucial components of today's infrastructure, supporting everything from business to public services. The Opportunity Join our international and multidisciplinary team of passionate design engineers and help us create high-quality, sustainable, and innovative data centre structures. You will work on medium to large-scale mission-critical projects, covering all stages of design - from concept to construction supervision and handover. As a Senior Mechanical Engineer your role will be as part of an interdisciplinary team lead the design of mechanical systems (Building servies and cooling) on medium to large-scale Mission Critical projects through all design stages from Concept to Construction Supervision and Hand-Over Lead the preparation and review of design deliverables Lead projects and work closely with our data centre clients to deliver quality work to meet their specific needs Present technical content for review by technical and non-technical...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jun 28, 2026  
Senior Mechanical Design Engineer
Senior Mechanical Engineer - Water Sector St Albans: Hybrid (3 Days Office) Contract: £45-£50/hr (Outside IR35) Advance TRS are supporting a rapidly growing consultancy in their search for a Senior Mechanical Engineer. Joining a newly formed London business unit, you'll have the unique opportunity to help build a team from the ground up, influence how projects are delivered, and play a significant role in the future growth of the business within the UK water market. You'll lead the mechanical design of clean water and wastewater projects, producing high-quality engineering solutions while mentoring junior engineers and coordinating multidisciplinary design teams. Key Responsibilities: * Deliver mechanical design solutions for water and wastewater projects * Produce calculations, reports, specifications and design drawings * Lead and review work from junior engineers and CAD technicians * Coordinate with suppliers, manufacturers and subcontract design teams * Ensure designs...
IR35 Status:
Outside IR35

CV-Library Hertfordshire, UK Contractor
CL
Jun 17, 2026  
Senior Electrical Design Engineer
Working with this busy engineering solutions provider who have a strong order book with schemes across the TFL estate - they are looking for an Electrical Design Engineer to join there multi-disciplinary design team Your role will involve: - Creating LV electrical designs for station work, including lighting and power systems. - Problem-solving to integrate new designs with legacy infrastructure. - Working closely with the wider design and CAD teams. The position is ideally suited for someone who: - Is an experienced practically minded electrical design engineer - Understands the practical challenges of electrical installation and buildability. - Can problem-solve on the spot when faced with non-standard site issues. You should have experience in RAIL/ LU (TFL) Standards Role is outside IR35 Your expert recruitment consultant is Trevor Parsons, call today on (phone number removed) or email (url removed) Eden Brown is committed to equality in the...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jun 13, 2026  
Senior Product Design Engineer
Role: Senior Product Design Engineer Location: London Contract Type: Contract / Freelance Duration: 6 months + Rate: £315 per day Status: Outside IR35 - Ltd co contract Shape Innovative Products from concept to reality. An exciting opportunity has arisen with a highly respected product innovation consultancy known for delivering cutting-edge solutions across healthcare, consumer, and industrial sectors. Working within a collaborative, multidisciplinary environment, you will play a pivotal role in transforming ideas into commercially successful, production-ready products. This is an ideal opportunity for an experienced Product Design Engineer who thrives on solving complex engineering challenges, balancing creativity with technical rigour, and leading projects from research through to manufacture. The Opportunity: As a Senior Product Design Engineer, you will work on a broad portfolio of technically challenging and highly innovative projects within consumer electronics,...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
May 16, 2026  
Senior Electrical Design Engineer
An excellent opportunity has arisen for an experienced Electrical Design Engineer to join a well-established building services consultancy in London on an contract basis outside IR35. This hybrid role will involve working as part of a multidisciplinary building services engineering team, supporting the delivery of electrical design solutions across a range of building projects. The successful Electrical Design Engineer will contribute to the development of electrical building services designs, technical documentation and coordinated BIM models. This role is based in the London office with hybrid working available, offering the chance to work on high-quality building services projects alongside experienced engineers and consultants. Key Responsibilities · As an Electrical Design Engineer, your responsibilities will include: · Producing electrical building services designs for a variety of building projects · Developing electrical schematics, layouts and...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jun 28, 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
Jun 28, 2026  
Contract Senior Structural Engineer
Contract Senior Structural Design Engineer Central London Start ASAP Outside IR35 c£47-49 p/h Ltd   Contract Senior Structural Engineer   A leading architecturally led Structural Engineering consultancy in Central London is currently looking for hire a Contract Senior Structural Engineer to ideally start early July ’26.   Due to a number of significant wins our client is looking find a Senior Structural Engineer with a minim of 8-10 years design experience.  The successful candidates will be able to design proficiently in all main materials with first class ability to design in steel and RC.   Our client is currently working on a £100m + signature London structure which they need some additional design input and assistance on.   Hybrid working can be offered.  An hourly rate of c £47-49 p/h can be offered with an Outside IR35 capacity.    Our client can offer a minimum 3 month contract assignment, however with current work load this is likely to be extended.   For more information...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jun 27, 2026  
Senior / Principal Civil Engineer
Job Title: Senior / Principal Civil Engineer Salary: Dependent on experience Location: St Albans (Hybrid - minimum 3 days office-based) Type: Permanent or Contract (Outside IR35 available) - Hybrid About the Role: Our client is seeking experienced Senior and Principal Civil Engineers to join a multidisciplinary design team delivering projects across the regulated water sector. These opportunities are suited to engineers with strong design experience within water and wastewater who enjoy solving complex engineering problems, developing practical solutions and contributing to the successful delivery of projects. Depending on experience, you will take ownership of technical delivery, support multidisciplinary design teams and contribute to maintaining high standards of engineering quality and compliance. Principal-level candidates will also provide technical leadership and mentoring support across the team. Working closely with senior management and project teams, you will...
IR35 Status:
Outside IR35

CV-Library Hemel Hempstead, Hertfordshire Contractor
CL
Jun 27, 2026  
Senior / Principal Civil Engineer
Senior Civil Design Engineer Contract type: Contract or Permanent Scope: Outside IR35 Location: Hertfordshire Industry: Water Purpose of the Role We are working with a specialist engineering consultancy providing design and infrastructure support across the rail and utilities sectors. The organisation supports projects from early design through to installation, delivering safe and efficient solutions on complex infrastructure programmes. The Civil Design Engineer will produce civil engineering design deliverables for projects across the regulated water industry, ensuring all work meets required safety, quality, and technical standards. Key Responsibilities Deliver civil engineering design packages that meet safety, quality, and regulatory requirements. Develop efficient design solutions from project scopes and site visits, communicating these with clients and project teams. Support and guide CAD technicians, junior designers, and graduates. Prepare design risk assessments,...
IR35 Status:
Outside IR35

CV-Library Hertfordshire, UK Contractor
CL
Jun 27, 2026  
Contract Product Design Engineer
Job Title: Contract Product Design Engineer * Contract Length: Initial 6 months - with potential for extension. * Start: ASAP * Rate: Depended on Experience * IR35: Outside IR35 * CAD: AutoDesk Inventor * Location: East Midlands - In office 5 days a week * Hours: 37.5h OR part time opportunities for the right candidate. Please see the key details below: I'm currently supporting an engineering manufacturer that are looking to bring a Contract Product Design Engineer in on an initial 6 month contract, with potential for long term contract opportunity. Following significant investment into research, development and innovation, they are looking for someone to support a growing pipeline of new product development projects. Key Responsibilities: * Helping develop new products from concept through to manufacture * Product design and development * Mechanical design and CAD modelling * Prototype development and testing * Supporting multiple innovation...
IR35 Status:
Outside IR35

CV-Library Derby, Derbyshire Contractor
CL
Jun 27, 2026  
Senior Civil Engineer
Senior Civil Engineer - Contract Opportunity 🚨 📍 UK Hybrid / Remote 💰 £40 per hr 🕒 6 Month Contract ✅ Outside IR35 ⏰ 40 Hours Per Week We are working with a well-established Engineering Consultancy that is looking to appoint an experienced Senior Civil Engineer to support a growing workload across both Infrastructure and Water projects. This is an excellent opportunity for a contractor with strong drainage, highways and water sector experience looking for a long-term Outside IR35 assignment. Key Requirements: ✔ Surface & Foul Water Drainage Design ✔ MicroDrainage Modelling ✔ SuDS Design & Drainage Strategies ✔ Flood Risk Assessments (FRAs / FCAs) ✔ S104, S106 & S185 Drainage Agreements ✔ Highways Design (S38, S278 & S184) ✔ 3D Earthworks Modelling & Cut / Fill Optimisation ✔ Project & Design Management ✔ Tender Preparation & Fee Proposals ✔ Liaison with the Environment Agency, LLFAs, IDBs & Water Authorities Software: 🔹 Civils 3D...
IR35 Status:
Outside IR35

CV-Library Remote Contractor
CL
Jun 26, 2026  
Principal Communications Engineer - Rail
PSR Solutions are recruiting for an experienced Principal Controls & Communications Engineer (CRE) to support major Network Rail projects with a leading UK engineering contractor. This contractor has a strong pipeline of work across rail infrastructure, known for delivering complex multidisciplinary projects with a practical, delivery-focused approach. Role Overview Acting as the Communications CRE, you'll lead design assurance and delivery across control systems and telecoms packages, ensuring compliance, safety, and buildability across the project lifecycle. Key Responsibilities Act as CRE on Network Rail projects Lead design across SCADA, PLC, BMS, DCS and telecoms systems (CCTV, GSM-R, FTN, PAVA, VOIP, RF) Carry out CAT2 checks and ensure compliance with NR standards Manage design documentation, RFIs, TQs, and approvals Coordinate with BIM/CAD teams for design integration Support HAZID / HAZOP / HAZCON processes Attend FAT/SAT and commissioning activities Interface...
IR35 Status:
Outside IR35

CV-Library North West London, London Contractor
CL
Jun 26, 2026  
Structural Engineer
Senior Structural Engineer Mainly remote - occasional office visits / site visits £40-50 per hour (outside IR35 available) Purpose of Job Role The delivery of projects, on a day to day structural designs and calculations. Key Accountabilities Project Delivery - The delivery of a project in a timely manner and on budget. Collaborating with the Client - Working with the client to develop a full project brief ensuring that they achieve their desired result. Preparing Calculations - Preparing Building Regulations calculations packages for submission to the Local Authority. Specific Tasks • The preparation of project specifications • Developing project briefs and tendering for subcontractors. • The carrying out of Structural Surveys and preparation subsequent reports. Person Specification BEng Civil or Structural Engineering Experience - essential • 10 Years+ building structures design • Good working knowledge of both British Standards and Eurocodes. • Experience...
IR35 Status:
Outside IR35

CV-Library DE11, Swadlincote, Derbyshire Contractor
CL
Jun 25, 2026  
Senior Electrical Engineer
Senior Electrical Engineer – Water Sector Location: Stretford, Manchester (Hybrid Working Available 3 days from the office and 2 days from home) Contract: 12-Month +  Hours: 40 Hours Per Week Rate: £56.82 Ltd per hour (Subject to IR35 Assessment Confirming Outside IR35 Status) The Opportunity We are seeking an experienced Senior Electrical Engineer to lead the delivery of high-quality electrical engineering designs, ensuring technical excellence, safety, compliance, and innovation throughout project lifecycles. Working as part of a multidisciplinary engineering team, you will take responsibility for electrical design activities on major water sector projects, whilst providing technical leadership, mentoring junior engineers, and coordinating with suppliers, subcontractors, and key stakeholders. Experience of Waste Water Treatment plant or Sewage Networks design.  Key Responsibilities Deliver high-quality electrical design packages in accordance with project requirements,...
IR35 Status:
Outside IR35

CV-Library Stretford, Manchester, UK Contractor
CL
Jun 25, 2026  
Senior EICA Engineer (Water Sector)
Senior EICA Engineer (Water Sector) Location: Stretford, Manchester (Hybrid – 3 days office based, 2 days home based) Contract: 12 Months +  Hours: 40 hours per week Rate: £55.00–£56.82 Ltd per hour (subject to IR35 assessment confirming Outside IR35 status) Description Are you an experienced Electrical, Instrumentation, Control & Automation (EICA) Engineer with a strong background in the water industry? We are seeking a Senior EICA Engineer to join a major water sector programme, supporting the delivery of high-quality electrical engineering designs across wastewater treatment works, sewage networks, and clean water projects. This is an excellent opportunity to take a lead role in electrical design delivery while mentoring junior engineers and working alongside multidisciplinary teams on critical infrastructure projects. Key Responsibilities Deliver high-quality electrical design packages in accordance with safety, regulatory, and technical standards. Produce detailed...
IR35 Status:
Outside IR35

CV-Library Stretford, Manchester, UK Contractor
CL
Jun 25, 2026  
Principal / Lead Engineer
Principal / Lead Engineer Python / Cloud / Terraform / IAM / DevOps / infrastructure-as-a-code IaC Rate: Circa £600 - £700 PD (Outside IR35), 6 Months Location: London / Hybrid x2 days We are seeking an experienced Principal / Lead Engineer to join a highly ambitious organisation building a large-scale, mission-critical data and technology platform. This is a unique opportunity to join at the earliest stages of a major programme and play a key role in shaping its technical foundations. Working closely with the CTO and a small team of senior engineers, you will lead the design and implementation of core infrastructure, establish engineering standards and practices, and make architectural decisions that will have long-term strategic impact. If you enjoy solving complex technical challenges, influencing technology strategy, and creating robust engineering foundations, this role offers an exceptional opportunity to make a lasting impact. Role & Responsibilities Technical...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jun 25, 2026  
Site Engineer
Site Engineer – Tunnelling / Heavy Civils Long-Term Contract | Major Infrastructure Scheme | South Coast We are looking for a capable and driven Site Engineer to support delivery on a major tunnelling and pipeline infrastructure scheme. This is a key role on a technically challenging section of works, offering long-term continuity and the opportunity to be part of a high-performing delivery team. This position will suit an engineer with strong setting out capability and previous experience in tunnelling, shafts, or heavy civils who is confident working in a fast-paced, site-based environment. The Role You will play a critical part in the delivery of tunnelling works, supporting day-to-day site operations and ensuring engineering accuracy, quality, and compliance throughout. Key Responsibilities Setting out for tunnelling, shafts, and associated civils works Managing and maintaining accurate site records, QA documentation, and as-builts Supporting delivery teams with...
IR35 Status:
Outside IR35

CV-Library Southampton, UK Contractor
CL
Jun 23, 2026  
Senior .Net Developer
Senior .Net Developer My customer is looking for a Senior .Net Developer to join them on a 9 Month contract basis, Outside IR35 & working fully remote. AI assisted development will need to be at the forefront of how you develop, operate, and process your workload and coding tasks. As the succesfull Senior .Net Developer you'll be joining a greenfield build of a large scale platform. This isn't maintaining legacy code, it's building something new from scratch using modern patterns and AI-assisted development. The platform already has a working prototype but you'll be taking it into production. You'll be working across the full stack of backend services: building APIs, designing data models, implementing business logic engines, and making sure the platform scales. You'll need to be comfortable owning significant pieces of work with minimal hand-holding and making good technical decisions independently. Must Have * Strong .NET / C# — this is your primary skill and it needs to be...
IR35 Status:
Outside IR35

CV-Library United Kingdom Contractor
CL
Jun 20, 2026  
Senior Civil Engineer
Fully Remote (UK) 💰 £40 - £50 per hour 📅 12 Month Contract ✅ Outside IR35 We’re working with a leading engineering consultancy delivering a major overhead power line extension project in Scotland, and they’re looking to bring in a Senior Civil Engineer with strong Civil 3D modelling capability. This is a fully remote, Outside IR35 contract on a technically interesting infrastructure scheme. The Role You’ll play a key part in delivering highways and drainage design packages to support large-scale infrastructure works, including: • Civil 3D modelling across highways and infrastructure • Drainage design (surface) • Public Road Improvement Schemes (Road Widening, Junction Improvements, Passing Place Design) • Supporting Section 21 and Section 56 (Scotland) approvals and delivery (Similar to S278 works). • Working closely with multidisciplinary teams on a nationally significant project What They’re Looking For • Strong Autodesk Civil 3D modelling experience •...
IR35 Status:
Outside IR35

CV-Library Remote Contractor
CL
Jun 20, 2026  
Senior Electrical Engineer
Location: West Wales This is an excellent opportunity to join a leading engineering business during a period of continued growth as they support the Oil & Gas, Petrochemical, Renewable Energy and Nuclear sectors. Our client will consider applicants for either a staff or contract position – for a contractor the role will be outside IR35. Role & Responsibilities * Undertake design and checking of deliverables according to discipline and area of expertise. * Checking the quality of subcontractor design work to ensure compliance with agreed client design specifications. * Preparation and checking of deliverables including drawings, schedules, datasheets, specifications, (input to control philosophies and narratives if applicable). * Must understand wiring diagrams, control logic diagrams, system descriptions, system calculations, 1-line and 3-line AC drawings, AC & DC schematics, and be able to size equipment and perform cable sizing calculations * Participation...
IR35 Status:
Outside IR35

CV-Library Burton Ferry, Pembrokeshire Contractor
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