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Contractor 34
Engineering Outside IR35 Hatfield

34 jobs found in Hatfield

CL
Jul 30, 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
Jul 30, 2026  
Principal Mechanical Enigneer
Principal Mechanical Engineer - Water Sector St Albans: Hybrid (3 Days Office) Contract: £55-65p/h (Outside IR35) Advance TRS are supporting a rapidly growing consultancy in their search for a Principal 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...
IR35 Status:
Outside IR35

CV-Library Hertfordshire, UK Contractor
CL
Jul 29, 2026  
BESS Electrical Engineer
Location: Remote - Rare site visits to Scotland (Only when essential) * Contract Duration: 6 months initially - extension &/or offer of permanent likely thereafter * IR35: Outside IR35 * Rate: £650–£750 per day * Start: Immediate preferred, but candidates on up to 4 weeks’ notice considered An urgent opportunity has opened for a BESS Electrical Engineer to support a live battery energy storage project that is now entering a critical final design and commissioning phase. The project has already been through delays and now needs an experienced BESS specialist who can step in quickly, take ownership of the remaining electrical design work, resolve final technical issues and help drive the project through to delivery. This is a remote outside IR35 contract with occasional site visits to Scotland, an immediate start preferred, and genuine potential for extension or a permanent role afterwards. For the right Senior BESS Electrical Engineer, there is the likelihood for...
IR35 Status:
Outside IR35

CV-Library EC2N, Broad Street, Greater London Contractor
CL
Jul 30, 2026  
BIM Technician
BIM Technician - Building Services (Contract) London | Hybrid Working | Outside IR35 | £30-£35 per Hour Ready to work on some of London's most exciting building services projects? We're looking for a BIM Technician with Building Services experience to join a growing consultancy delivering technically challenging projects across a range of sectors. If you're confident using Revit MEP and enjoy working on complex, multidisciplinary schemes, this could be the ideal contract for you. What's in it for you? This is an excellent opportunity to join a busy and well-established building services consultancy with a strong pipeline of work across London and the South East. You'll work on a diverse range of projects spanning commercial fit-outs, heritage buildings, data centres, healthcare, residential developments and life sciences facilities, giving you exposure to technically challenging and varied schemes. Alongside an Outside IR35 contract paying £30-£35 per hour, you'll benefit from...
IR35 Status:
Outside IR35

CV-Library Central London, London WC2N 5DU, UK Contractor
CL
Jul 30, 2026  
Multiple Wiremen
Rubicon Consulting is currently recruiting for Multiple Wiremen on a 6 month rolling Contract, located in London. This role falls outside IR35 Role Overview Rubicon Consulting is recruiting multiple experienced Wiremen for a live HV substation project in London. This is a hands-on site role focused on transformer wiring, glanding, terminating and multicore cable work within a live substation environment. Positions are offered on 6 month rolling contracts with strong potential for extension across the wider project programme. Main Scope of Work • Transformer wiring — control and protection wiring to substation transformers • Glanding and termination of LV, MV and multicore cables • Termination of multicore control and instrumentation cabling • Installation and dressing of cable containment and cable routes as required • Cable testing, continuity checks and fault-finding support • Working from wiring schedules, schematics and cable block diagrams • Liaising with the site...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jul 29, 2026  
TP141 Commissioning Engineer
TP141 Commissioning Engineer (High Voltage) Outside IR35 | Competitive Day Rate | Long-Term Projects (2 Years) East Anglia & Oxfordshire Are you a TP141 Commissioning Engineer looking for your next long-term contract on major National Grid transmission projects? We are recruiting experienced TP141 Commissioning Engineers to support the delivery of two major substation projects in East Anglia and Oxfordshire, each offering approximately two years of work. This company is a specialist high-voltage engineering company delivering end-to-end power system solutions across the transmission and distribution sectors. Its expertise includes system design, manufacturing, installation, testing, commissioning and maintenance of HV substations and protection & control systems, supporting utility, renewable energy and critical infrastructure projects throughout the UK and internationally. Working on a subcontract basis, you will play a key role in the safe commissioning and...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jul 29, 2026  
Data Engineer - Airbyte
Lead Data Engineer Outside IR35 £500–£525 per day 3 Month Initial Contract   We're looking for an experienced Lead Data Engineer to join a high-profile project. This is a hybrid role, requiring 2 days per week onsite in London, with the remainder worked remotely. What we're looking for: Proven experience leading data engineering teams, with a strong track record of mentoring and developing junior engineers. Expert knowledge of Python and Airbyte CDK, with experience building custom data connectors (a key focus of the role). Strong experience developing ELT pipelines using PySpark in Databricks within a Medallion Architecture. Experience with Terraform and deploying Airbyte connections and Databricks assets using GitHub Actions. Confident working with JIRA, GitHub, and VS Code.  Desirable: Experience with Databricks Delta Live Tables (DLT). Knowledge of Databricks Asset Bundles
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jul 28, 2026  
Contract Senior Structural Engineer
Contract Senior Structural Engineer c£48 to £50 p/h Ltd   Central London Outside IR35   Contract Senior Structural Engineer   Our client who is a well-established firm of Consulting Engineers in London requires a Senior Structural Engineer on a contract basis for a 9 month assignment.    The successful applicant will be tasked with carrying out various Structural Safety Surveys and Reports across a portfolio of London based building structures.  Ideally applicants will have a minimum of 10 years industry experience.   Immediate start.  Outside IR35, so a Ltd Company can be used if preferred.   Good hourly rate.   To apply please contact Nick Rothery at Energi People
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jul 25, 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
Jul 24, 2026  
BIM Coordinator - Contract
BIM Coordinator - Contract Central London £300.00 per day (outside IR35) We are urgently looking for an experienced BIM Coordinator for an ongoing contract role in London. You will coordinate BIM models across civil and structural disciplines, ensure ISO 19650 compliance, resolve clashes, and support project teams with hands-on technical BIM input. Our client needs candidates with strong experience with Revit, Navisworks, BIM 360 (or similar) and a background in civil & structural engineering is essential. Immediate start, long-term contract. This role is based full time in the office with no hybrid option. Please send your CV to Graham Ventham at Conrad Consulting to learn more and be considered
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jul 23, 2026  
BMS Commissioning Engineer
BMS Commissioning Engineer 📍 London Region 📅 9-Month Contract 🪙 Outside IR35 I'm recruiting for an experienced BMS Commissioning Engineer to support a major project across the London region. This is an excellent opportunity for a commissioning engineer with a strong background in delivering BMS projects from pre-commissioning through to final handover. The Role: Commission, test, and optimise Building Management Systems (BMS) to ensure they operate efficiently and meet project specifications. Produce commissioning documentation, reports, and support final client demonstrations and handovers. Diagnose and resolve commissioning issues, making software and control strategy adjustments where required. Carry out point-to-point testing, functional testing, and system validation across HVAC plant and associated controls. Requirements: 5+ years' experience commissioning Building Management Systems. Strong understanding of HVAC systems, control strategies, and BMS principles....
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
May 12, 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
May 12, 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
May 12, 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
May 12, 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
May 12, 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
May 12, 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
Jul 30, 2026  
Senior Civil Engineer
Senior Civil Engineer Location: London (Hybrid/Flexible - typically 1 day per week in the office) Rate: £45.00 - £50.00 per hour Hours: 40 hours per week Are you a Senior Civil Engineer looking for your next contract opportunity? We're working with an established engineering consultancy that is looking to strengthen its civil engineering team with an experienced Senior Civil Engineer. With a growing pipeline of work, you'll have the opportunity to support the delivery of major infrastructure projects, predominantly within the data centre sector, alongside healthcare and other commercial developments. This is a fantastic opportunity to work on technically challenging projects, taking responsibility for the design and coordination of drainage, utilities and earthworks packages while collaborating with a multidisciplinary team. Key Responsibilities ·Lead the design and delivery of drainage, utilities and earthworks schemes. ·Produce and review technical designs using Civil 3D...
IR35 Status:
Outside IR35

CV-Library City of London, London, UK Contractor
CL
Jul 26, 2026  
Document Controller
Document Controller | BESS Projects | Outside IR35 We are seeking an experienced Document Controller to support the delivery of Battery Energy Storage System (BESS) projects. These projects are at various stages of development, including execution, mobilisation and Final Investment Decision (FID), providing an excellent opportunity to work across the full project lifecycle. Working within a multi-project environment, you will take ownership of document control processes and ensure all project documentation is managed, maintained and distributed effectively through Aconex. Key Responsibilities * Set up and administer project document control systems in Aconex. * Manage document workflows, transmittals, approvals and revision control. * Maintain project document registers and reporting. * Support project teams, contractors and stakeholders with document management activities. * Ensure compliance with company and project procedures. * Manage project records...
IR35 Status:
Outside IR35

CV-Library Aldgate, Greater London Contractor
CL
Jul 29, 2026  
Site Manager
Site Manager  Location: Romford, Essex Contract Type: Contract (Outside IR35) Duration: 2 Months We are seeking an experienced Site Manager to oversee the safe and successful delivery of civil engineering, water, and wastewater infrastructure projects in Romford. The successful candidate will be responsible for managing day-to-day site operations, ensuring projects are delivered on time, within budget, and to the highest standards of safety, quality, and compliance. This is an excellent opportunity for a proactive and hands-on Site Manager with experience working within utilities, water, civil engineering, or infrastructure environments. Key Responsibilities Lead and manage day-to-day site operations, ensuring works are delivered safely, efficiently, and in accordance with the project programme. Plan, monitor, and coordinate site activities, labour, plant, materials, and subcontractors. Ensure full compliance with Health, Safety, Environmental, and Quality (HSEQ) requirements...
IR35 Status:
Outside IR35

CV-Library Romford, UK Contractor
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