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Outside IR35 senior mechanical engineer

30 senior mechanical engineer jobs found

CL
Dec 13, 2025  
Senior / Principal Mechanical Engineer (hybrid)
Senior Mechanical Engineer – Contract – West Wales / Hybrid Location: West Wales / Hybrid This is an excellent opportunity to join a leading engineering business during a period of continued growth as they support the Oil & Gas, Petrochemical and Renewable Energy sectors. This role is deemed to be outside IR35. Our client is based in West Wales and can accommodate a hybrid working pattern. Role & Responsibilities * Participate in relevant meetings such as Design Reviews, Model Reviews and HAZIDs. * Execute all Piping/Mechanical Engineering activities and maintain technical integrity. * Familiarity with piping, static equipment and rotating equipment. * Develop and contribute to mechanical equipment specification / datasheets to allow purchase of range of equipment. * Oversee designers in the development of multi-discipline plant upgrade project. * Supporting the development of Mechanical and Piping layout for a range of energy projects at different...
IR35 Status:
Outside IR35

CV-Library SA72, Burton Ferry, Pembrokeshire Contractor
CL
Dec 14, 2025  
Contract Senior Mechanical Design Engineer
Senior Mechanical Design Engineer - MEP Surrey Contract (Outside IR35) Hybrid - 1/2 days a week in Office Rate: £44/hr - £46/hr A consultancy we are partnered with is looking for a contract senior mechanical design engineer to work on a contract basis in their Surrey office. Consultancy or contractor background welcome, project is a large-scale residential scheme. Contract length is like to be 6-8 months. Looking to start someone in early January. If you are interested please apply with your CV
IR35 Status:
Outside IR35

CV-Library Farnham, Surrey Contractor
CL
Dec 17, 2025  
Contract Senior RF Engineer
Contract Senior RF Engineer – RF Systems / Microwave – Reading – Hybrid – Outside IR35 We’re supporting a growing engineering team who need an experienced Senior RF Engineer on a long-term contract. You’ll be working across RF subsystem design, modelling, prototyping, and testing for next-generation ground terminals, with 3 days a week on-site in Reading. The project is expected to run for around 12 months and sits outside IR35. Please note that you must be eligible for SC Clearance for this contract (though you do not need to already be SC Cleared) What you’ll be doing: * Designing RF front-end modules (LNAs, PAs, filters, mixers, converters) for Ku and Ka applications * Running RF system simulations and propagation modelling * Analysing simulation and measurement data * Working with modem, antenna, and mechanical teams to optimise terminal-level performance What we’re looking for: * 7–8 years in RF or microwave design * Strong understanding of RF circuits,...
IR35 Status:
Outside IR35

CV-Library Reading, Berkshire Contractor
CL
Nov 28, 2025  
Senior Project Engineer
Outside of IR35 --- Rate negotiable My client has had an increase in work so requires more project support. You will be covering projects in the Distillery, Pharmaceutical and Chemical industries and my client is ideally looking for someone with similar industry experience, delivering engineering projects. There will be some specifying and procuring mechanical equipment involved along with supporting the engineering team, checking quotes and technical queries as well as project management. Previous experience working as a Senior Project Engineer / Project Manager covering engineering projects and working in a design office / engineering consultancy is essential. If this position is initially of any interest please apply and I will be able to provide further details. *Please note my client is only willing to consider people that have the right to work in the UK and that are already living in the UK
IR35 Status:
Outside IR35

CV-Library Greater Manchester, UK Contractor
CL
Dec 21, 2025  
Python Engineer - SC Cleared - Fully Remote - OUTSIDE IR35
Job Title: Python Engineer Location: Fully Remote (England) Clearance: Active SC Clearance Required Duration: 12 month contract - will extend Project: Major Defence Programme – Secure Data Exchange Platform Core Mission Build and harden Python based services and data processing components that underpin a secure, scalable, distributed defence platform. Transform prototype code into operational, production ready modules. This is a hands on engineering role requiring strong Python skills, experience in secure or mission critical environments, and the ability to contribute across backend services, data pipelines, integration layers, and automation. Key Responsibilities • Develop, refine, and maintain Python microservices and backend components supporting secure data exchange. • Translate prototype logic and PoC implementations into scalable, production-grade code. • Implement APIs, integration layers, and event-driven services aligned to agreed architecture patterns. • Apply secure...
IR35 Status:
Outside IR35

CV-Library 1 Effingham St, Rotherham S65 1AJ, UK Contractor
CL
Dec 20, 2025  
Contract Maintenance Engineer
Contract Maintenance Engineer Location: Cheshire Rate: £35ph Outside IR35 Shifts: 3 Shift 6-2/2-10/10-6 The Role We are seeking a Contract Maintenance Engineer with strong experience in automated warehouse environments. You will be responsible for providing reactive, preventive, and continuous improvement maintenance across a range of automated equipment. This role requires a multi-skilled engineer with a mechanical bias, solid electrical competency, and a proven track record in fast-paced automation or logistics settings. Key Responsibilities Reactive and planned maintenance on automated conveyor systems, sortation equipment, palletisers, AS/RS systems, robotics, and associated material handling assets Fault finding on mechanical, electrical, pneumatic, and hydraulic systems Performing component replacements, mechanical strip-downs, alignment, and adjustments Supporting root cause analysis and continuous improvement initiatives Working safely at height on high bay automation...
IR35 Status:
Outside IR35

CV-Library Middlewich, Cheshire Contractor
CL
Dec 20, 2025  
Process Commissioning Engineer
Role: Process Commissioning Engineer Location:  Bournemouth Rate: Up to £550 p/d Duration: 18 Months + /ongoing Sector: Water/Wastewater Treatment   Are you an experienced Process Commissioning Engineer in the water sector? Do you have a background in chemical management of Wastewater & water Recycling schemes? We are seeking an experienced Process Commissioning Engineer to join a team attached to a major clean water supply project. This role is Outside IR35 and requires full-time availability on a Bournemouth Water site in Bournemouth. Key Responsibilities: ·Leading and managing the commissioning activities for water and wastewater treatment plants. ·Developing detailed commissioning plans, method statements, and risk assessments. ·Carrying out site-based commissioning of process systems. ·Optimizing system performance to meet design and regulatory requirements. ·Collaborating with designers, contractors, and project teams to resolve technical challenges....
IR35 Status:
Outside IR35

CV-Library Bournemouth, UK Contractor
CL
Dec 20, 2025  
Sub Agent
We are looking for an experienced Sub Agent to join a major heavy civils project in Newcastle. This is a long-term opportunity supporting complex structural, earthworks and reinforced concrete operations on a high-value scheme. Key Responsibilities * Assist the Site Agent and Project Manager with daily delivery of site activities. * Coordinate site engineers, subcontractors, plant and materials to meet programme milestones. * Lead setting-out verification, quality checks and ITP management. * Oversee H&S compliance, ensuring RAMS, permits and safe systems of work are followed. * Manage reporting, site records, and progress updates. * Resolve technical queries and support delivery of temporary works. * Maintain strong communication with client reps, design teams and internal departments. Requirements * Proven experience as a Sub Agent or Senior Site Engineer on heavy civils projects (earthworks,...
IR35 Status:
Outside IR35

CV-Library Newcastle upon Tyne, Tyne & Wear Contractor
CL
Dec 20, 2025  
Project Quality Lead
Quality Lead / Quality Co-Ordinator / QC QA quality engineer Outside IR35 | £350–£700 per day | 12 months + extension A leading UK engineering organisation delivering complex, high-profile projects within the energy and industrial sectors is seeking an experienced Quality Coordinator on a contract basis to support a major long-term oil and gas programme. With a reputation for technical excellence, robust engineering standards and strong customer delivery, this is an excellent opportunity to join a stable organisation overseeing quality across a multi-year project. Key Responsibilities Lead all QA/QC activity across the project, ensuring full compliance with customer and industry requirements Act as the main point of contact for customer quality matters, managing communication and technical interface Oversee audits, inspections, documentation reviews and quality reporting Coordinate quality activity with internal teams including Projects, Design, Manufacturing and SHEQ Support the...
IR35 Status:
Outside IR35

CV-Library Manchester, UK Contractor
CL
Dec 19, 2025  
Mechanical Design Coordinator
Role: Design Coordinator / Principal Engineer (Mechanical) Location: St. Asaph (Flexible Office/Home Presence) Rate: £60 p/h - Outside IR35/LTD Company Duration: 12 Months+ Sector: Wastewater   The business we're working with is an award-winning and innovative contractor providing project solutions for the water and wastewater industry including design, construction, commissioning, operation and maintenance.   The majority of the design packages to work through and sub contractors to manage are from an M&E bias.   As a Design Coordinator you will be responsible for supporting the Design Manager to coordinate the design outputs within a multi-discipline team across the Project or Projects assigned to you from resourcing, technical and timely prospective ensuring compliance with company procedures and Client specification.   This will include distributing packages of work to other team members and taking on client facing responsibilities alongside managing sub...
IR35 Status:
Outside IR35

CV-Library St Asaph, Saint Asaph LL17, UK Contractor
CL
Dec 19, 2025  
Electrical Design Coordinator
Role: Design Coordinator / Principal Engineer (Electrical) Location: St. Asaph (Flexible Office/Home Presence) Rate: £60 p/h - Outside IR35/LTD Company Duration: 12 Months+ Sector: Wastewater   The business we're working with is an award-winning and innovative contractor providing project solutions for the water and wastewater industry including design, construction, commissioning, operation and maintenance.   The majority of the design packages to work through and sub contractors to manage are from an M&E bias.   As a Design Coordinator you will be responsible for supporting the Design Manager to coordinate the design outputs within a multi-discipline team across the Project or Projects assigned to you from resourcing, technical and timely prospective ensuring compliance with company procedures and Client specification.   This will include distributing packages of work to other team members and taking on client facing responsibilities alongside managing sub...
IR35 Status:
Outside IR35

CV-Library St Asaph, Saint Asaph LL17, UK Contractor
CL
Dec 19, 2025  
Senior Security Engineer | £500 - £700 | Outside IR35 | 3 Months | Fully Remote
Senior Security Engineer | £500 - £700 | Outside IR35 | 3 Months | Fully Remote We’re hiring a Cybersecurity Engineer to support a client on a 3-month initial contract focused on achieving SOC 2 and ISO 27001 compliance. This role is Outside IR35, fully remote, and offers a daily rate of £500–£700. The successful candidate will play an integral role in spearheading security tool integration and driving the implementation of controls, monitoring, and documentation for compliance readiness. Key Requirements Proven experience in security engineering and compliance delivery Deep understanding of SOC 2, ISO 27001, GRC frameworks and audit processes Hands-on experience integrating cybersecurity tools and platforms such as Crowdstrike, Vanta, Rapid7 Strong adherence to Azure security best practices Knowledge of TX-RAMP and FedRAMP frameworks is highly beneficial Produce complete, accurate documentation to the highest possible standard Implement static code analysis, configure Azure...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Dec 19, 2025  
Senior Pipeline Engineer
Senior Pipeline Engineer Contract £50 -£65 per hour ARM have an exciting opportunity for a Senior Pipeline Engineer you'll play a vital role in every aspect of pipeline engineering on Transformational Programmes for critical UK infrastructure with opportunities to work on iconic engineering projects at home and abroad. The Role: You?ll be required to manage a team to undertake technical design work following relevant design standards and codes, and to high-quality levels. Prepare briefs, scopes of work, and input into bid proposals. Successfully manage time and budgets to key project milestones and programmes. Work closely with teams in the UK and overseas to deliver integrated design solutions. Adhere to quality assurance standards in design. Requirements: Must be Chartered Civil Engineer. Experience in pipeline design delivery, including engagement of multidisciplinary design resources. Sound knowledge of hydraulics, pipe restraint and jointing, pipeline materials,...
IR35 Status:
Outside IR35

CV-Library Manchester, Greater Manchester Contractor
CL
Dec 18, 2025  
Senior Clean Water Process Engineer
Senior Clean Water Process Engineer Location: Flexible (Epsom / London / Peterborough / Cambridge) Pay: Competitive - dependent on experience Role Overview We are seeking a Senior Clean Water Process Engineer to lead the design, optimisation, and delivery of clean water treatment processes for major infrastructure projects. You will provide technical leadership, mentor junior engineers, and ensure projects meet safety, quality, and regulatory standards. Key Responsibilities Lead process design, commissioning support, and optimisation. Prepare technical documentation, reports, and P&IDs. Mentor multidisciplinary teams and support project delivery. Ensure compliance with codes, standards, and sustainability principles. Essential Requirements Chartered Engineer (Process or Chemical/Process Engineering). Proven experience in clean water process engineering. Strong knowledge of conventional and advanced water treatment technologies. Ability to lead teams and manage...
IR35 Status:
Outside IR35

CV-Library West End, London Contractor
CL
Dec 18, 2025  
Azure CloudOps Engineer
A Council in London are seeking an Azure CloudOps Engineer to design, deploy, and maintain highly resilient, secure, and cost-optimised cloud infrastructure and services on Microsoft Azure. This role is responsible for establishing and adhering to strict UK Government Digital Service (GDS) reliability standards and implementing rigorous FinOps governance policies. The engineer must drive operational excellence through comprehensive automation and proactive Site Reliability Engineering (SRE) practices. The role is for 6 months paying around £(Apply online only)pd (outside IR35). Responsibilities: Service Reliability Engineering (SRE) Implementation: The engineer is required to define, actively monitor, and regularly report on critical Service Level Indicators (SLIs) to ensure all services meet defined Service Level Objectives (SLOs) for critical user journeys, ensuring compliance with GDS standards. This involves leading measurement workshops with product and delivery teams....
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Dec 18, 2025  
Principal Electrical Engineer - Building Services Design
PRINCIPAL ELECTRICAL ENGINEER (BUILDING SERVICES DESIGN) - SURREY - ONGOING CONTRACT ARM are working with a global consultancy, who are providing engineering and consultancy services to some of the largest projects and programmes of work in the UK and beyond. We are recruiting for an experienced Principal Electrical Engineer to support on their building design services client work on a contract basis and working hybrid from Surrey. About You: You will be a degree qualified engineer and will be Chartered with either IET or CIBSE. You will have experience and knowledge in energy reduction within building design and services and how decarbonisation can be implemented in schemes. You will have knowledge of energy and carbon data and analytics. You will have experience of working within a design consultancy or working within a contractor design environment.We can consider applications from both Senior and Principal Engineers for this role. What you will be doing: This position...
IR35 Status:
Outside IR35

CV-Library Epsom, Surrey Contractor
CL
Dec 18, 2025  
Mechanical Design Engineer
Mechanical Design Engineer - Contract (Outside IR35) Location: London (3 days on-site per week) A leading client is seeking an experienced Mechanical Design Engineer to join their team on a contract basis. What we're looking for: Strong background in mechanical engineering and new product development Proficiency in SolidWorks or Creo Experience designing consumer goods or electronicsContract Details: Outside IR35 Rate - £400-£500 per day Hybrid working (London, 3 days per week)If you're interested and available, please send your CV and we'll share more details. Please click to find out more about our Key Information Documents. Please note that the documents provided contain generic information. If we are successful in finding you an assignment, you will receive a Key Information Document which will be specific to the vendor set-up you have chosen and your placement. To find out more about Progressive please visit Progressive Recruitment, a trading division of SThree...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Dec 18, 2025  
Mechanical Design Engineer (Piping, Pumping Systems)
Mechanical Design Engineer (Piping / Hydraulics / Pumping Systems) Location: Birmingham (Hybrid, 2 - 3 Days Onsite) Contract: 12 Months | Outside IR35 | December / January Start Rate: Highly Competitive (Ltd / CIS) Are you a Mechanical Design Engineer with strong experience in piping systems, pump hydraulics, water industry process equipment or mechanical assemblies? Are you looking for a technical delivery role where you'll be producing high-quality mechanical design outputs under the guidance of an experienced Design Manager? We are recruiting for a Mechanical Design Engineer to support a major UK water-sector infrastructure programme based in Birmingham. This position is purely mechanical focusing on pumping systems, hydraulic design, pipework layouts, mechanical bracketry, skids, fabrications, and equipment integration. This is a 12-month contract, with strong potential to extend. The role suits someone who is hands-on with mechanical design documentation, who can produce...
IR35 Status:
Outside IR35

CV-Library Birmingham, West Midlands Contractor
CL
Dec 18, 2025  
Principal EC&I Engineer
Job Title: Principal EC&I Engineer Location: Client Hub - Warrington or Cumbria (Hybrid, minimum 3 days per week onsite) Contract: Initial 6-month contract (strong likelihood of extension) Rate: £65-£70 per hour (outside IR35, subject to confirmation) Project: AWE Programme (details restricted due to security sensitivity) Role Overview We are seeking a highly experienced Principal Electrical, Control & Instrumentation (EC&I) Engineer to join our client's delivery team within a major nuclear infrastructure programme. This role will act as a technical authority, providing leadership and high-level engineering expertise within a multidisciplinary environment. You will operate from one of the client hubs (Warrington or Cumbria), supporting design development, technical governance, and delivery of EC&I scope on an AWE-related project. Due to the secure nature of the work, project details cannot be disclosed at this stage. Key Responsibilities Lead EC&I...
IR35 Status:
Outside IR35

CV-Library Warrington, Cheshire Contractor
CL
Dec 17, 2025  
Security System Design Engineer
Rullion are looking to recruit for the following role: Security Solutions Design Engineer ASAP Start End Date April 2026 £400 Per day Outside IR35 Remote working with occasional travel to Northampton or Warwick Our client is currently searching for a senior Systems Engineer to join their busy team, delivering large utilities-based projects. As the Senior Systems Engineer you will be responsible for ensuring the various engineering activities through the course of a design and build project lifecycle. You will also be required to ensure a full understanding of the requirement specifications to ensure that design and construction are fully compliant. You will have a strong working knowledge of the client procedure documents referred to in the contract and relative to the engineering delivery process, ensuring that these requirements are incorporated fully. The Systems Engineer will be required to: Develop designs to meet the requirement of the project specification and in...
IR35 Status:
Outside IR35

CV-Library Farnborough, Hampshire Contractor
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