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Contractor 32
Engineering Outside IR35 Harefield

32 jobs found in Harefield

CL
Aug 02, 2026  
Mechanical Construction Manager
My client requires a Mechanical experienced Construction Manager for a long term role (2 + Years) in Uxbridge on the delivery of a large scale infrastructure project. Paying £(Apply online only) a shift + Outside IR35 + Weekly Payments + Long Term Works (2 + years) The position will require you to assist the Project Manager managing the sub contractors deliver large scale Mechanical packages. This is a long term contract role and would suit someone who has extensive experience covering the following: * Delivery of Mechanical packages of work * Reporting into the Senior Project Manager * Forming close links with the client’s representatives and their teams at a senior level. * Attending site meetings, liaising with clients and subcontractors * Promote a positive health and safety culture across the project & workforce * Managing any changes that occur throughout the project * Can work well under pressure in a fast-paced environment * A strong...
IR35 Status:
Outside IR35

CV-Library Hillingdon, Greater London Contractor
CL
Sep 18, 2026  
Mechanical Commissioning Engineer
Role: Mechanical Commissioning Engineer Project: Data Centre Location: High Wycombe IR35: Outside Mechanical commissioning engineer for a separate new-install project in High Wycombe, supporting a London project. The role requires a hands on mechanical commissioning technician with some controls experience. Relevant experience includes commissioning chillers, CRAH's, cooling distribution units, cryogenic units, fan-wall units and OEM controls, including BMS integration. Responsibilities include checking terminations and continuity, confirming units are safe for energisation, completing paperwork and power-on requests, starting up and configuring units, checking pump flow rates and valve operation, and progressing to group control of the units
IR35 Status:
Outside IR35

CV-Library High Wycombe, Buckinghamshire Contractor
CL
Sep 18, 2026  
Project HSE Manager
Project HSE Manager - £750 per Day £750 per day | Outside IR35 | Contract | Kingston, London ARM is recruiting an experienced Project HSE Manager to join a major Oil & Gas, energy and engineering project based in Kingston. This is an excellent opportunity for a senior HSE professional to lead HSE activities across the engineering and development phases of an EPIC project. Key Responsibilities Lead the Project HSE Management System throughout the EPIC phases. Act as the project HSE focal point and advise Project Management. Develop and coordinate the HSE team. Interface with Clients and manage HSE contractual requirements. Lead HAZOP, HAZID, risk assessments and risk management activities. Lead accident and incident investigations. Establish HSE monitoring and audit programmes. Manage subcontractor HSE performance. Support environmental management activities. Ensure compliance with UK HSE legislation, CDM, ISO and IOGP standards. Lead project HSE reviews and close-out...
IR35 Status:
Outside IR35

CV-Library Kingston upon Thames, London Contractor
CL
Sep 18, 2026  
Hse Manager
We are seeking an experienced HSE Manager with proven offshore installation/project execution experience to support a major energy project in SW London. Candidates must have worked on offshore installation or construction projects rather than solely providing offshore HSE support. This is a senior project position responsible for the management and development of the Project HSE Management System throughout the engineering and development phases. You will act as the HSE focal point for the project, provide advice to Project Management and lead the project HSE team. The role will involve managing Client and subcontractor HSE interfaces, ensuring compliance with UK legislation, CDM Regulations and IOGP standards, leading accident and incident investigations, and establishing HSE monitoring and audit programmes. You will also lead project risk management activities including HAZOP, HAZID and risk assessments, while supporting environmental management and project HSE close-out....
IR35 Status:
Outside IR35

CV-Library KT1, Grove, Greater London Contractor
CL
Sep 19, 2026  
Maintenance Engineer - OUTSIDE IR35 - Manufacturer
Contract Maintenance Engineer - Hatfield Hertfordshire (Outside IR35) Rate: £37ph Outside IR35 LTD or Umbrella Hours:8-hour shifts - Monday to Friday and overtime Length: 6 months Start: ASAP About the Role We're looking for an experienced Contract Maintenance Engineer to join a manufacturer in Hatfield. This is a hands-on a contract where you'll keep high-speed production lines running smoothly in a modern, well-invested site. Why Apply? Outside IR35 6 month contract Supportive team with good feedback from current engineersKey Duties Preventive and reactive maintenance of machinery Working 8 hour rotation shifts, mornings, afternoons, nights. Mechanical/electrical fault finding and repairs Work on conveyors and automated production equipment Minimise downtime and support continuous improvementWhat We're Looking For Mechanical or Electrical qualification (Apprenticeship / NVQ / C&G) Hands-on experience as a Maintenance Engineer in manufacturing Multi-skilled...
IR35 Status:
Outside IR35

CV-Library Hatfield, Hertfordshire Contractor
CL
Sep 17, 2026  
Senior Electrical Design Engineer
Senior Electrical Design Engineer UK Nationals Only (UK Defence Contract) Circa £400/day Ltd (outside IR35)   Join us as a Senior Electrical Engineer on an exciting major projects (Hospitals, Military, Data Centres, Prisons) You'll play a key role in delivering multiple electrical aspects across power engineering led projects consisting of High Voltage, Low Voltage, Generation, Fire Alarms, Security, Lighting etc..  This is an opportunity to work collaboratively with our design partners and supply chain to create innovative solutions that meet our client's requirements whilst maintaining the highest health, safety, and environmental standards. What will you be responsible for? As a Senior Electrical Engineer, you'll be working within the Design/ Delivery team, supporting them in delivering integrated electrical engineering solutions from inception to completion. Your day to day will include: Leading electrical engineering delivery for multiple schemes, collaborating with Tier 2...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 17, 2026  
Structural Engineer
Structural Engineer - Data Centres London | £39-£44 per hour | Outside IR35 | 6-Month Contract We're looking for an experienced Structural Engineer to support the delivery of a major data centre project, with a project pipeline expected to run for around 2 years. You'll need strong structural design experience and be proficient in Tekla Structural Designer. Previous data centre experience is ideal, although Engineers from large-scale industrial or similarly complex projects will also be considered. What you'll be doing Delivering structural design for a major data centre project Producing and developing designs using Tekla Structural Designer Supporting detailed structural engineering and project delivery Coordinating with wider engineering and design teams Reviewing technical information and resolving design issues Supporting the project as it progresses through deliveryWhat we're looking for Strong Structural Engineering experience Tekla Structural Designer proficiency -...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 13, 2026  
SCADA/Controls Engineer (Remote)
SCADA & Controls Engineer – EMEA Delivery Location: Remote – EMEA Contract: 9–12 Months Sector: Renewable Energy / Battery Energy Storage Recruitment Partner: Spencer Ogden Outside IR35 The Opportunity Spencer Ogden is supporting a leading organisation within the renewable energy and battery energy storage sector in the search for an experienced SCADA & Controls Engineer to join their EMEA Delivery team. This is an excellent opportunity to work on utility-scale Battery Energy Storage System (BESS) projects, with responsibility for SCADA, controls engineering, grid integration, communications, testing and project delivery across EMEA. You will play a key role in developing and implementing SCADA and controls solutions, integrating BESS control systems with Transmission System Operator (TSO) Energy Management Systems (EMS), and ensuring projects meet technical, operational and grid compliance requirements. Key Responsibilities Lead the delivery of project-specific...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 12, 2026  
Assistant Site Manager
We're looking for an experienced Assistant Site Manager to support the delivery of works at a 400kV substation. You'll work closely with the Site Manager, providing SR163 cover when required and supervising site teams and subcontractors to ensure works are delivered safely, efficiently and to programme. What you'll be doing Supporting the Site Manager across daily substation activities Providing SR163 cover when the Site Manager is off site Supervising subcontractors and monitoring site progress Ensuring compliance with CDM regulations and Safe Systems of Work Setting teams to work and monitoring activities through completion Issuing Permits to Dig and supporting site safety procedures Maintaining quality standards and supporting as-built informationWhat we're looking for Previous experience on HV / EHV substation projects Strong site supervision or management experience Knowledge of CDM regulations Experience implementing Safe Systems of Work Confident supervising...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 10, 2026  
Senior Machine Learning Engineer
Senior Machine Learning Engineer Location: London Hybrid | Salary: £60-£80ph – Outside IR35 Hexwired Recruitment has partnered with an innovative AI technology company developing next-generation machine learning solutions for complex real-world applications. Due to continued growth, they are looking for a Senior Machine Learning Engineer to join their expanding team in London. Required Experience * Strong C++ development skills. * Experience with CUDA for GPU acceleration. * Python and PyTorch experience. * Knowledge of Transformers, computer vision or image analysis. * Postgraduate or commercial experience within AI/Machine Learning This is an exciting opportunity to work on cutting-edge AI research, developing advanced machine learning technologies that will directly influence innovative real-world products. You'll work alongside a highly skilled team, solving complex technical challenges and shaping the future of AI systems. The company are rapidly expanding and are at...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 08, 2026  
BMS Service Engineer
BMS Service Engineer Contract 3 – 6 months London & M25 We are offering an accomplished BMS Service Engineer £38 - 45 per hour (outside IR35) to join a well-established Controls company on a contract to cover London and the M25 area. This is an initial 3 – 6 month contract with potential to extend further. The BMS Service Engineer position:- As a BMS Service Engineer, you will need to demonstrate exceptional technical understanding of BMS, in particular Trend control systems.   Your duties will include carrying out service and maintenance on BMS Control systems along with small works.  You will be expected to work independently using your own skill and initiative as well as part of a larger team of engineers when required. Key skills of the BMS Service Engineer:- Exceptional technical knowledge and experience of the BMS sector. Proven experience of carrying out servicing and small works on BMS Controls Systems. Qualifications and experience with Trend control systems....
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 08, 2026  
BMS Commissioning Engineering
BMS Commissioning Engineer, Tridium, Trend or Siemens Immediate start 4 - 6 month contract £300 - £360 per day Our client requires an accomplished BMS Commissioning Engineer with Tridium, Trend or Siemens Building Management Controls experience to join their team on either a project in London or a site in Hertforshire . There are several roles and projects currently available in: the City, East London and also in Hertfordshire, the best site would depend on your location and experience for each project. This is on a contract basis and will initially run for 4 to 6  months. To start immediately and is likely to be extended on a rolling basis.  This position could also be as the Lead Commissioning Engineer if you have the right experience and the rate would then reflect this. Key skills required:- Experienced in the Commissioning of Building Management Systems ( BMS ) Qualified and experienced with Tridium ,Trend or Siemens Control systems. CSCS Skill Card or equivalent is...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 08, 2026  
BMS Commissioning Engineer
We have a fantastic contract opportunity for an experienced BMS Commissioning Engineer to join an exciting project in London. On offer is an initial 3 to 6  month contract (with the potential to extend), £300 - £340 per day (outside IR35), and the opportunity to work for a successful BMS integration business. The BMS Commissioning Engineer position: - As a BMS Commissioning Engineer, you will have fantastic experience and knowledge of commissioning Building Management Systems, in particular Trend and Tridium systems.  You will be required to perform software modifications, writing, and generating graphics, working alongside a team engineers. Key skills of the BMS Commissioning Engineer: - Exceptional technical knowledge and experience of the BMS sector. Proven experience commissioning BMS systems Qualifications and experience with Trend and Tridium or Delta Ability to write and manipulate software and graphics. CSCS Skill card or equivalent Benefits of the BMS Commissioning...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 08, 2026  
BMS Commissioning Engineer
BMS Commissioning Engineer, Cylon or Tridium London £330 to £400 per day, Weekly pay Our client requires an accomplished BMS (Building Management Systems) Commissioning Engineer with Cylon Controls (or Tridium) experience to work on a major prestigious project in Central London. The work will involve the commissioning of Fan Coils Units using Cylon Controls, with on-going major plant commissioning works available thereafter. This contract will initially run for 6 months, however opportunity for extension and to join exciting projects in the future will be available for the right candidate. Role Profile The successful applicant for this BMS Commissioning Engineer role will need to have experience of using Cylon or Tridium controls to commission Fan Coil Units and major plant Key skills required:- * Experienced in the Commissioning of Building Management Systems (BMS) * Qualified and experienced with Cylon or Tridium Control systems. * CSCS Skill Card or equivalent. £330 - £400...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 08, 2026  
BMS Service Engineer
We have a fantastic opportunity for a proficient BMS Service Engineer to join a well-established building controls business working on multiple contracts in London on a contract basis. This contract position offers an excellent hourly rate paid weekly ( outside IR35) Company Profile Our client is a household name in the world of BMS providing full turnkey solutions to the Building Energy Management sector since the late 90’s. With their wealth of expertise, they are able to secure projects of all size and type and deliver a best-in-class service from design all the way to end user handover. The Role of the BMS Service Engineer As a BMS Service Engineer you will be responsible for the pre-planned and reactive maintenance of Building Management Systems, predominantly across London. You will have in-depth knowledge of BMS (Building Management Systems) hardware including fault finding, wiring and networking. You will possess the knowledge and experience to be involved with small...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 08, 2026  
BMS Project Manager
We have a fantastic contract opportunity for an experienced BMS Project Manager to join an exciting project in London. On offer for the successful BMS Project Manager is a 12 month contract, £350 - £450 per day, and the opportunity to work for a successful BMS intelligent integration business. The BMS Project Manager role:- As a BMS Project Manager, you will be a highly skilled, professional and driven individual who has a wealth of knowledge and background in the BMS sector. You will be required to liaise confidently and positively with the client delivering a fantastic service, attending progress meetings, managing sub-contractors, commissioning engineers, and covering all aspects of project management. To apply you must have a proven track record of managing large BMS projects. Key Skills required of BMS Project Manager:- * Exceptional knowledge and background in the BMS industry. * Proven track record of managing large BMS projects, all aspects. * Strong commercial and...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Sep 13, 2026  
Project Manager - BMS (contract)
BMS PROJECT MANAGER (Contract) London (hybrid/flexible) | 6-12 months | £400-£500 per day (Outside IR35) We're working with a prestigious client in the building controls industry who are looking for an experienced BMS (building management systems) Project Manager to oversee a range of small to large-scale projects across London and the surrounding areas. This is a great opportunity for someone with strong BMS expertise who enjoys leading projects from start to finish, ensuring quality, budget and timescales are consistently achieved. What you'll be doing: Leading contract meetings and managing project status from handover through to completion Working closely with customers to understand and deliver site-specific requirements Providing technical guidance to clients and colleagues across BMS projects Managing budgets, supplier orders and ensuring efficient project cash flow Designing control strategies, point lists and system descriptions for commissioning teams Staying up...
IR35 Status:
Outside IR35

CV-Library City of London, London Contractor
CL
Sep 04, 2026  
Electrical Engineer
Electrical Engineer (12-Month Fixed-Term Contract) Location: London (Hybrid – 2 days in the office, 3 days working from home) Rate: £50-55 per hour - outside IR35 Limited Company! We are seeking an experienced Electrical Engineer to join a specialist engineering team on a 12-month fixed-term contract with hydrid working available. This is an excellent opportunity to work on technically challenging single point mooring (SPM) projects supporting FPSO and FSO facilities within the oil & gas sector. Working as part of a multidisciplinary team, you will be responsible for delivering high-quality electrical engineering documentation, supporting vendors and site teams, and ensuring compliance with industry standards. Key Responsibilities * Prepare and review Ex equipment datasheets. * Develop and maintain electrical load lists. * Perform cable sizing and voltage drop calculations. * Prepare and review specifications for electrical equipment and LV...
IR35 Status:
Outside IR35

CV-Library Southwark, Greater London Contractor
CL
Sep 17, 2026  
Power Systems Studies Engineer
We're currently seeking two experienced Power System Studies Engineers to support major international onshore energy projects. Key Details Start: ASAP Rate: £65 per hour (Outside IR35) Location: Surrey Working Pattern: 4 days onsite / 1 day remotePurpose of the Role You'll be providing power system studies support for onshore projects, working closely with project teams and external vendors to deliver high-quality engineering studies. Scope of Work Running and reviewing power system studies Equipment sizing and system analysis Overseeing third-party study vendors Delivering studies using EMT softwareSkills & Experience Required Captive power generation, with or without grid connection Studies will include equipment sizing, load flow, short circuit, dynamic motor starting, harmonic studies, arc flash & transient stability Tasks will include running power system studies and overseeing third party vendors Provide power system studies for projects including EMT...
IR35 Status:
Outside IR35

CV-Library Surrey, UK Contractor
CL
Sep 17, 2026  
Lead Technical Safety & Environmental Engineer
Lead Technical Safety & Environmental Engineer - FEED (12-month contract) RHL is recruiting a Lead Technical Safety & Environmental (TS&E) Engineer for a 12‑month FEED programme supporting a major upstream development in Saudi Arabia. The work focuses on sustaining and increasing capacity across multiple Gas Oil Separation Plants (GOSPs), plus associated power generation and well injection facilities. You'll lead TS&E inputs, manage key safety deliverables, and ensure environmental compliance across the FEED scope, based in the UK office. Key responsibilities Lead, coach and coordinate a small TS&E team (engineers/designers). Own and review technical safety deliverables including: Fire & Gas detection philosophy and layout reviews Escape, Evacuation & Rescue Analysis (EERA) inputs and actions Hazardous Area Classification (HAC) deliverables and interface reviews Interface with client and multi-discipline engineering teams through FEED (and into EPC...
IR35 Status:
Outside IR35

CV-Library Surrey, UK Contractor
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