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Contractor 31
Outside IR35 Harpenden construction

31 construction jobs found in Harpenden

CL
Mar 21, 2026  
Quantity Surveyor Construction
Freelance Quantity Surveyor - On site Central London (Near Old Street) - Immediate start - 8+ months contract - Outside IR35. Tradeline are actively seeking a Quantity Surveyor who is able to complete an 8 month contract based on site near Old Street, Central London. You will be required to carry out a forensic review of the project costings and deliver excellent commercial skills including CVR's and Final Accounts. Reporting into a Commercial Manager and working within a team of 5, you will be involved in delivering an extensive cost management service on the project. The role would suit an experienced Quantity Surveyor who has had experience in build projects, excellent negotiation skills and working within a high pressurised environment. There will also be aspects of troubleshooting, so experience dealing with problematic construction projects would be desirable
IR35 Status:
Outside IR35

CV-Library Hackney, Greater London Contractor
CL
Mar 15, 2026  
Senior Construction Manager
Senior Construction Manager (Outside IR35-LTD) Certain Advantage is hiring for a Senior Construction  Manager based in the Surrey area. This role is on a contract basis and is site-based. The Company We’re working with an engineering company specialising in delivering innovative solutions across aerospace, defence, energy, and government sectors. Does this sound like your next career move? If you’re ambitious to grow, this may be your next role? The Role: This role is for a Senior Construction Manager—someone ambitious and ready to make an impact. You’ll be results-oriented and driven to succeed. You’ll be leading a small, experienced, and collaborative team, and be responsible for: EPCI Bid Support for Indonesian Project Support the development of ITB Development of the construction execution plan for the EPC Phase Participate in project constructability workshopsThe Individual We’re looking for people who can show: EPC and FEED LNG experience in a similar roleThe Benefits:...
IR35 Status:
Outside IR35

CV-Library Leatherhead, UK Contractor
CL
Apr 05, 2026  
Interim Health and Safety Consultant
Interim Health and Safety Consultant - £400 - £450 per day (Outside IR35) - North West London * Are you looking for a role where you can help shape safety culture across a major London transport operation? * Do you enjoy working closely with operational teams to drive improvements in health, safety, environment and quality? * Are you motivated by the opportunity to influence change at the beginning of a transformational journey? If so, look no further… * An exciting opportunity has arisen for an Interim Health and Safety Consultant to join a leading London transport operator, supporting the development of health, safety, environmental and quality arrangements across its operations. * Reporting to the Head of Health and Safety, this is a highly operational role where you will work closely with garage teams, project stakeholders and senior leaders to drive continuous improvement, ensure legal compliance and strengthen safety culture across multiple...
IR35 Status:
Outside IR35

CV-Library Wembley, Greater London Contractor
CL
Apr 01, 2026  
Lead Piping Designer
Lead Piping Designer - Addison Project, Harlow For over 25 years, Addison Project plc has delivered innovative, sustainable engineering solutions across the chemical, pharmaceutical, energy, and food & beverage sectors. As a family‑owned business with UK‑wide coverage, we combine technical excellence with a collaborative, client‑focused approach. Our fully integrated EPCM capability supported by strong CDM and HSSEQ leadership and accredited management systems ensures projects are delivered safely, efficiently, and to the highest standards from concept through to commissioning and start‑up. If you're passionate about engineering and want to join a dynamic, people‑focused consultancy driving progress and sustainability across the UK’s manufacturing and process industries, Addison Project is the place to grow your career. Job Type: Contract Outside IR35 Start: Spring 2026 Location: Harlow, Essex with travel to site in Home Countries Workscpe Addison Project Plc are seeking...
IR35 Status:
Outside IR35

CV-Library Harlow, Essex Contractor
CL
Apr 01, 2026  
Senior MEP Quantity Surveyor
Senior MEP Quantity Surveyor (Freelance) Central London Office (3 days) | 2 days WFH Specialist MEP Contractor A leading international engineering and infrastructure group is seeking an experienced Senior MEP Quantity Surveyor to join its London-based commercial team on a freelance basis. This role offers the opportunity to play a key part in delivering major commercial and data centre projects valued up to £100m, working within a highly regarded and technically driven environment. The Role As Senior MEP Quantity Surveyor, you will take commercial ownership of a portfolio of specialist MEP packages across large-scale, complex schemes. Working closely with project teams and supply chain partners, you will ensure robust commercial management from procurement through to final account. Key Responsibilities Full commercial management of multiple specialist MEP packages Procurement, negotiation, and appointment of subcontractors Cost planning, forecasting, and reporting Contract...
IR35 Status:
Outside IR35

CV-Library Greater London, UK Contractor
CL
Apr 03, 2026  
Stock Condition Surveyor/DEA
Are you looking for work within the Building Surveying industry? Look no further! 1st Select are looking for an experienced Stock Condition Surveyor / Domestic Energy Assessor who would be able to carry out detailed inspections of houses and flats, both internally as well as externally. Our client is a leading Consultancy in the Surveying industry, that has won a large contract covering Hackney and we are looking for 2 Stock Condition Surveyors/DEAs to partake in this program. Responsibilities/requirements will include… Stock Condition Surveying Experience Experience with lodging EPCs HHSRS Experience Benefits for the worker Gain more experience in the building surveying industry Flexible working hours *Payment outside of IR35* This will be a 3-month contract with the possibility of leading on to additional work. If this fits your area of expertise, please contact Lucy Saphier
IR35 Status:
Outside IR35

CV-Library Hackney, Greater London Contractor
CL
Mar 07, 2026  
Project Manager - M&E
Freelance Project Manager – Data Centre Location: Slough Contract Type: Freelance / Outside IR35 (subject to assessment) Project: New-Build Data Centre (M&E Delivery) Duration: 12 months (with potential extension) Reporting to: Senior Project Manager / Operations Manager Overview TXM recuit are seeking an experienced Freelance Project Manager to support the delivery of a major new-build mission-critical data centre project in Slough for a sub contractor. The role is focused on managing Mechanical & Electrical packages, coordinating site activities, and ensuring the project is delivered safely, efficiently and to the required technical standards. This is a fast-paced, high-value engineering environment requiring strong leadership, technical capability, and excellent stakeholder communication. The ideal candidate will have a proven track record delivering M&E packages on hyperscale or enterprise data centre projects. Key Responsibilities * Oversee day-to-day...
IR35 Status:
Outside IR35

CV-Library Slough, Berkshire Contractor
CL
Apr 02, 2026  
Flood Modeller
We are working with a well-established water and infrastructure consultancy looking to strengthen their team with an experienced Flood Modeller.   This is an excellent opportunity to take ownership of complex flood risk and hydraulic modelling projects while working alongside a highly experienced technical team. You will play a key role in delivering sustainable development solutions across a range of UK infrastructure and development schemes.   This is a 6 month initial contract role that falls OUTSIDE IR35. Out client is based in London and open to remote workers.   Key responsibilities   ·Deliver hydraulic modelling and flood risk projects from concept through to construction ·Build, run and interpret river and surface water models using Flood Modeller, TUFLOW and InfoWorks ICM ·Produce and review Flood Risk Assessments and Drainage Strategies ·Develop concept and detailed designs for flood protection and surface water management schemes ·Provide technical advice to...
IR35 Status:
Outside IR35

CV-Library Central London, London WC2N 5DU, UK Contractor
CL
Apr 04, 2026  
SecOps Engineer
IT Security Operations Engineer - London (4 days onsite / 1 day WFH) Up to £600 p/d (outside IR35) A leading construction engineering business is seeking an SecOps Engineer to their team. They are a well-established business about to enter considerable operational change making it an exciting time to join and be a part of their journey. This role carries responsibility for ensuring collaboration between Information Security and the IT Ops team, you'll ensure the implementation of technical security controls supporting risk mitigation and contributing to the continual improvement of the business's security composure. Responsibilities: Provide expertise on application, network and infrastructure security Monitor security solutions including SIEM, threat detection and data security, endpoint protection, network analytics for alerts Provide documentation for technical standards to meet corporate security policies/industry best practice Perform security reviews, identify gaps in...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 03, 2026  
Planner-Freelance-London
Freelance Planner-London/swindon-£Outside IR35 I have an urgent need for a freelance Planner to join a major Infrastructure Contractor on a freelance basis to work on a tender for a major civil engineering scheme. Duties will include developing the programme, adding resource to this, change, cost loading the programme and ultimately develop the programme with the Bid team. To be considered you will be an experienced Planner within the Civil Engineering sector and have solid P6 experience. Top rate (to be discussed) on offer and 3 month contract that could be extended. London or Swindon based, minimal home working on offer as need to be with the team. Urgent and excellent need so if interested please send your CV to Dave Rowe by email or call Dave on (phone number removed)
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 03, 2026  
NEC Supervisor - Marine
Job Title: NEC Supervisor – Marine Location: Immingham Port Contract Type: Freelance IR35 Status: Outside IR35 Duration: Until April 2028 A Tier 1 Contractor delivering a major port infrastructure development at Immingham Port is seeking an experienced NEC Supervisor (Marine) to join the project team on a freelance, Outside IR35 basis. This is a long term opportunity on a high profile scheme, supporting the delivery of the marine and nearshore construction works. The successful candidate will report directly to the Lead NEC Supervisor and will play a key role in ensuring the works are carried out in line with NEC contract requirements and project quality standards. Role Overview The NEC Supervisor will oversee the marine and nearshore construction elements of the project. Key works include: • Marine piling operations • Dredging activities • Placement and installation of precast elements Due to the nature of the works, proven marine or coastal construction experience is...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 03, 2026  
Senior Civil Engineer
Senior Civil Engineer – Residential Development Location: Central London (Hybrid) Contract: 12-24 month contract IR35 Status: Outside IR35 Rate: Circa £40–£47 per hour An established independent civil and infrastructure design consultancy is seeking an experienced Senior Civil Engineer to support the delivery of residential development projects across London and the South East. The role offers involvement in technically engaging schemes, a collaborative project team, and flexible hybrid working from a Central London office. The Role You will take responsibility for the civil infrastructure and drainage design on residential-led developments, supporting projects from planning through to technical approvals and delivery. Key responsibilities include: Detailed drainage and SuDS design Preparation of Flood Risk Assessments and surface water strategies Managing local authority and statutory submissions Delivery of Section 278 and Section 38 designs and approvals...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Apr 01, 2026  
IT Applications Manager
IT Applications Manager - Central London £650 - £700 p/d (outside IR35) - 3 month initial term Well-established and highly profitable construction engineering business is seeking an experienced IT Applications Manager to join them on a permanent basis. This is a critical leadership role within an organisation undergoing significant digital transformation, with ambitious growth and acquisition plans driving demand for scalable, standardised and efficient business applications. Reporting into the Head of IT, you will lead the delivery, governance and optimisation of business applications across the enterprise. This role blends strategic oversight, hands-on expertise with modern low-code/no-code platforms and direct leadership of a multidisciplinary applications team. The IT Applications Manager will oversee a suite of core enterprise systems, including but not limited to: Workday, UKG (Kronos), COINS, SharePoint, Snowflake, Autodesk Construction Cloud, Pro-Sapien, Primavera P6...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Mar 07, 2026  
Data Centre Design Manager (MEP)
Our client is a dynamic, fast growing data centre Construction Support Consultant operating both in the UK and internationally. They have grown rapidly and have earned a fantastic reputation across DC expansion projects, white space and hyper scale dc schemes To support these exciting schemes they are looking for an MEP Design Manager to join the team The Design Manager will oversee and coordinate the design aspects of construction projects from inception to completion. Your primary responsibility will be to ensure that the design meets our clients requirements, adheres to regulatory standards, and offer value engineering solutions. You will collaborate with architects, engineers, contractors, and the project team to develop and implement design strategies that align with project goals. Additionally, the Design Manager will coordinate with external designers for each project and report any design risks to the Projects Director. The ideal applicant will be from an...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Feb 14, 2026  
BMS Commissioning Engineer
BMS Commissioning Engineer Contract We have a fantastic contract opportunity for an experienced Tridium BMS Commissioning Engineer to join an exciting and prestigious project in London. On offer is an initial 6 month contract (with the potential to extend), c£40 - £48 per hour, and the opportunity to work on one of London’s most interesting new projects in central London The BMS Commissioning Engineer position:- As a BMS Commissioning Engineer, you will have fantastic experience and knowledge of commissioning Building Management Systems, in particular Tridium Niagara.  You will be required to perform software modifications and full commissioning. The project is in central London and is a very prestigious refurbishment of a historical building. The project is a mixed use development incorporating a hotel, high end luxury residences, and shops and will be using state of the art new smart building technology. Key skills of the BMS Commissioning Engineer:- Exceptional technical...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jan 21, 2026  
Senior HVAC Design Engineer
We are working with this leading multi national data centre and mission critical specialist who are working on schemes across UK and europe. With data centres being crucial components of today's infrastructure, supporting everything from business to public services. Operators must ensure the longevity, efficiency, and sustainability of their sites while optimizing them for mission-critical tasks. The teams are at the forefront of designing innovative and energy-efficient data centres, ensuring that our clients meet their goals of performance, cost-efficiency, and sustainability. 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 part of an interdisciplinary team of architects, advisors &...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Dec 28, 2025  
MEP Design Manager - Data Centres
Our client is a dynamic, fast growing data centre consultant operating both in the UK and internationally. They have grown rapidly and have earned a fantastic reputation across DC expansion projects, white space and hyper scale dc schemes To support these exciting schemes they are looking for an MEP Design Manager to join the team The Design Manager will oversee and coordinate the design aspects of construction projects from inception to completion. Your primary responsibility will be to ensure that the design meets our client's requirements, adheres to regulatory standards, and offer value engineering solutions. You will collaborate with architects, engineers, contractors, and the project team to develop and implement design strategies that align with project goals. Additionally, the Design Manager will coordinate with external designers for each project and report any design risks to the Projects Director. The ideal applicant will be from an Electrical or HVAC...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Dec 28, 2025  
Senior HVAC Design Engineer
We are working with this leading multi national data centre and mission critical specialist who are working on schemes across UK and europe. With data centres being crucial components of today's infrastructure, supporting everything from business to public services. Operators must ensure the longevity, efficiency, and sustainability of their sites while optimizing them for mission-critical tasks. The teams are at the forefront of designing innovative and energy-efficient data centres, ensuring that our clients meet their goals of performance, cost-efficiency, and sustainability. 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 part of an interdisciplinary team of architects, advisors &...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jan 21, 2026  
Senior Electrical Design Engineer
Great opportunity to work with this leading international Consulting Engineers who are looking to bring on board a driven and experienced Senior Electrical Design Engineer, Outside IR35, to be an active part of a specialist design team consultancy to work on a variety of Data Centre projects. Key Responsibilities:- Create electrical design drawings and specs for Data Centre Projects. Ensure designs meet all standards and regulations. Support sustainable design and use of innovative tech Work closely with colleagues, clients, architects, and contractors.. Manage project deadlines, budgets, and deliverables. About you: You should hold Degree (or historic equivalent) in Electrical Engineering or related field.- Should have extensive experience in Mission Critical design and building services design, specifically on data centres.- Skilled in Amtech, and Dialux/Relux, with AutoCAD and Revit proficiency being beneficial. Sound knowledge of British Standards and building...
IR35 Status:
Outside IR35

CV-Library City of London, London Contractor
CL
Dec 11, 2025  
Senior Electrical Design Engineers
Great opportunity with a market leader to join their mission critical team working on key long term projects within the DC space - both hyper scale and co-lo. They are a global player with an outstanding market leader with a great pipeline of future work They are looking for experienced senior/ principal or associate level design engineers to join them or a long term basis working on a hybrid or semi-remote basis (by agreement) You should have current and developed experience as an electrical design engineer within the building services space and also with the mission critical / data centre space. Excellent rates and position 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 workplace and is an equal opportunity employer. Eden Brown is acting as an Employment Business in relation to this vacancy
IR35 Status:
Outside IR35

CV-Library City of London, London Contractor
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