Freelancer UK
  • All Jobs
  • Outside IR35
  • Agencies
  • Post a Job
  • Pricing
  • Guides
  • Sign in
  • Sign up
  • All Jobs
  • Outside IR35
  • Agencies
  • Post a Job
  • Pricing
  • Guides

Email me jobs like this

Email me jobs like this
Refine Search
Refine by IR35 Status
Unknown Status 66 Outside IR35 21 Inside IR35 16
Refine by Categories
Engineering 70 Construction 21 Information Technology 3 Other 3 Manufacturing 2 General Labor 1
Refine by Job Type
Contractor 103
commissioning engineer

103 commissioning engineer jobs found

CL
Aug 22, 2026  
HV Commissioning Engineer
HV Commissioning Engineer required to work on a Wastewater Treatment (WWTW) scheme in Wrexham, Wales. Duration is likely to be 3 - 4 weeks with potential extension or the possibility of moving on to other projects. The role will involve the commissioning and testing (primary and secondary injection) of HV systems, including protection, switchboards, busbars, line differential, G99 etc. Previous experience as an HV Commissioning Engineer (up to 33kV) is essential, with a focus on the commissioning of HV protection systems. Familiarity with standard software, such as Siprotec and Omicron, is also required. All test equipment, laptop and software will be provided, although the Commissioning Engineer is expected to provide their own hand tools. Accommodation, if required, will also be provided. Apply to Andrew Snelgrove at Deploy
IR35 Status:
Unknown Status

CV-Library Wrexham, Clwyd Contractor
CL
Aug 22, 2026  
Commissioning Engineer
Commissioning Engineer Location: Farnborough or Central London 12 month contract We're recruiting for an experienced Commissioning Engineer to join a major UK infrastructure programme within the water and wastewater sector. Working across the full project lifecycle, you'll lead commissioning activities from design review and testing through to handover and client training. What You'll Be Doing Managing commissioning activities, including FAT/SAT testing, installation verification, troubleshooting, and system handover. Coordinating with design teams, suppliers, subcontractors, and site personnel to ensure safe, compliant project delivery. Producing commissioning documentation, progress reports, and training operational teams on new equipment and processes. What We're Looking For Proven commissioning experience within the water or wastewater industry, ideally working for a principal contractor. Strong understanding of mechanical and electrical systems, commissioning...
IR35 Status:
Unknown Status

CV-Library City of London, London Contractor
CL
Aug 21, 2026  
Commissioning Engineer
BMSL have a current requirement for an experienced Commissioning Engineer for a 4 week duration in London. Previous experience in the following duties are required. MV Switchgear HIPOT Testing Siemens Siprotec Relays Omicron Test Equipment Scada Systems
IR35 Status:
Unknown Status

CV-Library W3, Acton Central, Greater London Contractor
CL
Aug 21, 2026  
Commissioning Engineer - Datacentre - Belgium
Data Centre Commissioning Engineer Join the Team Powering the World's Digital Infrastructure We are partnering with a leading data centre specialist to recruit an experienced Commissioning Engineer to support the delivery of mission-critical facilities across the UK and EMEA. This is a fantastic opportunity to work on some of the most technically advanced hyperscale and colocation data centre projects in the market. As a Commissioning Engineer, you will be responsible for overseeing and executing commissioning activities across complex MEP systems, ensuring operational readiness and successful project handover. Key Responsibilities * Manage and conduct commissioning activities for critical data centre infrastructure. * Develop and review commissioning plans, scripts, and procedures. * Coordinate testing of electrical, mechanical, and BMS systems. * Oversee Level 1-5 commissioning processes. * Witness Factory Acceptance Testing (FAT), Site Acceptance Testing...
IR35 Status:
Unknown Status

CV-Library United Kingdom Contractor
CL
Aug 21, 2026  
High Voltage Commissioning Engineer
HV Commissioning Engineer Location: Nationwide UK Project: Industrial Substation Industry: Engineering IR35: Outside Length: 6 months Details HV Switchgear Commissioning Engineer with hands on commissioning experience. Experience with Ormazabal or similar HV switchgear Nationwide travel required Ability to work alone Immediate or short-notice availability preferred
IR35 Status:
Outside IR35

CV-Library Staffordshire, UK Contractor
CL
Aug 21, 2026  
Commissioning Engineer - Major Water Treatment Project
Contract Role | Inside IR35 | Leicestershire Hays Civil Engineering are recruiting for a Commissioning Engineer to join a leading UK infrastructure contractor delivering a major wastewater treatment upgrade programme in Leicestershire.This is an excellent opportunity to work on a high-profile water project involving significant improvements to treatment capacity, environmental performance and long-term operational resilience at a major wastewater treatment facility. The Role As Commissioning Engineer, you will be responsible for planning, coordinating and delivering commissioning activities across mechanical, electrical, instrumentation, control and process systems. You will play a key role in ensuring assets are safely and efficiently brought into service and handed over to operations.Working as part of a multidisciplinary delivery team, you will support all aspects of commissioning from early planning and testing through to final system acceptance. Key Responsibilities...
IR35 Status:
Inside IR35

CV-Library Loughborough, Leicestershire Contractor
CL
Aug 19, 2026  
Commissioning Engineer
Commissioning Engineer (Water & Wastewater) Location: Riverside Way, Position Type: Full-Time, Permanent About the Role Are you an experienced Commissioning Engineer with a solid background in water and wastewater process engineering? We are looking for a proactive, meticulous engineer to drive hands-on commissioning, systems integration, and front-line site leadership across the full project lifecycle-from early design through to final handover. Operating out of our Watchmoor Park location, you will play a critical role in ensuring our multi-disciplinary projects are delivered safely, on time, and to the highest technical standards. Key Responsibilities Full Lifecycle Commissioning: Develop robust commissioning plans and procedures, lead FAT/SAT testing, configure analytical equipment, and manage defect close-outs from design to handover. On-Site Leadership & Supervision: Act as a front-line supervisor, overseeing installation and commissioning activities, approving...
IR35 Status:
Unknown Status

CV-Library Camberley, Surrey Contractor
CL
Aug 19, 2026  
Commissioning Engineer
Commissioning Engineer (Water & Wastewater) Location:, London, EC3A Position Type: Full-Time About the Role Are you a skilled Commissioning Engineer looking to join a high-performing engineering team based in the heart of London? We are seeking a proactive, detail-oriented engineer to drive full-lifecycle commissioning, systems integration, and technical site leadership across water and wastewater process engineering projects. Operating from our flagship office at 70 St Mary Axe, you will act as a key technical liaison between design teams, supply chains, and site operations ensuring end-to-end quality, compliance, and flawless handover on critical infrastructure projects. Key Responsibilities Full Lifecycle Commissioning: Develop commissioning plans, lead FAT/SAT testing, calibrate analytical equipment, and manage defect close-out from design through to handover. Site Supervision & Quality Control: Oversee subcontractor installations, witness testing against ITPs,...
IR35 Status:
Unknown Status

CV-Library City of London, London Contractor
CL
Aug 18, 2026  
Commissioning Engineer
Commissioning Engineer – Water Sector (Contract) Location: Midlands (Severn Trent Water Sites) Contract: Temporary / Contract Rate: £450–£500 per day (Outside IR35 subject to determination) We are currently recruiting for an experienced Commissioning Engineer to support the delivery of water and wastewater infrastructure projects across the Severn Trent Water network in the Midlands. This is a site-based contract role, ideal for a commissioning professional with a strong MEICA background and proven experience working on UK water utility projects. The Role As a Commissioning Engineer, you will be responsible for testing, proving and bringing new water treatment facilities, wastewater treatment works and pumping stations into operation, ensuring systems are safe, reliable and fully operational before client handover. Key Responsibilities * Commissioning MEICA installations on water and wastewater treatment projects. * Carrying out Factory Acceptance Tests (FATs), Site...
IR35 Status:
Outside IR35

CV-Library CV7, Balsall Common, Solihull Contractor
CL
Aug 16, 2026  
BMS Commissioning Engineer (contract)
BMS Commissioning Engineer - Contract Location: London Contract Length: 6 months Rate: £350 - £400 per day We're partnering with a market-leading BMS Controls specialist who is looking to engage experienced BMS Commissioning Engineers to support a portfolio of high-profile projects across London. This role will be heavily commissioning-focused, working on both new installations and system upgrades, with some involvement in service, maintenance and fault-finding where required. Experience with Trend, Tridium, Siemens or Schneider (StruxureWare) is highly desirable, and additional training can be provided if needed. The Role Commissioning and optimisation of new and existing BMS installations Ensuring systems are delivered to specification and client expectations Fault-finding and issue resolution during commissioning phases Producing commissioning reports and handover documentation Providing technical support and building strong client relationships What We're Looking...
IR35 Status:
Unknown Status

CV-Library City of London, London Contractor
CL
Aug 16, 2026  
BMS Commissioning Engineer - London
BMS Commissioning Engineer - London My client is an established Building Controls and Integration specialist who are currently looking to take on a BMS Commissioning Engineer to work on a number of projects in London. Role You would be responsible for commissioning and handing over a large BMS project and carry out and document all tasks associated with pre commissioning/ commissioning of a building management system. It is essential that the successful applicant has previous commissioning experience working on either Trend, Tridium, Struxureware or Siemens based Building Management Systems. Key Skills Qualified in Electrical or Electronic Engineering (HNC/ONC, equivalent or higher) Knowledge of the commissioning of building management systems A good understanding of HVAC applications of controls Fluent with building management systems enabling the writing and commissioning of controller/network software. Adaptable approach to workYou will be hardworking and committed to...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
Aug 16, 2026  
BMS Commissioning Engineer (contract)
BMS Commissioning Engineer - Contract Location: London Contract Length: 6 months Rate: £350 - £400 per day We're partnering with a market-leading BMS Controls specialist who is looking to engage experienced BMS Commissioning Engineers to support a portfolio of high-profile projects across London. This role will be heavily commissioning-focused, working on both new installations and system upgrades, with some involvement in service, maintenance and fault-finding where required. Experience with Trend, Tridium, Siemens or Schneider (StruxureWare) is highly desirable, and additional training can be provided if needed. The Role Commissioning and optimisation of new and existing BMS installations Ensuring systems are delivered to specification and client expectations Fault-finding and issue resolution during commissioning phases Producing commissioning reports and handover documentation Providing technical support and building strong client relationships What We're Looking...
IR35 Status:
Unknown Status

CV-Library City of London, London Contractor
CL
Aug 16, 2026  
BMS Commissioning Engineer
Are you a BMS Commissioning Engineer looking for your next opportunity? If so, please look below... Location: Birmingham Contract: 6-12 Months (Potential Extension) Rate: Competitive Ethos Engineering is seeking an experienced BMS Commissioning Engineer to support the delivery of major data centre, pharmaceutical, commercial and mission-critical projects. Key Responsibilities Commission and test Building Management Systems (BMS). Complete point-to-point, I/O, and functional testing. Diagnose and resolve commissioning issues. Work closely with project teams to ensure successful system handover. Produce commissioning documentation and reports. Requirements Proven BMS commissioning experience. Strong knowledge of HVAC controls and BMS systems. Experience with platforms such as Trend, Schneider, Siemens, Honeywell, Tridium Niagara, Delta, or Distech is desirable. Excellent fault-finding and communication skills. Full driving licence.This is an excellent contract opportunity to...
IR35 Status:
Unknown Status

CV-Library Birmingham, West Midlands Contractor
CL
Aug 16, 2026  
Commissioning Engineer Coordinator
Commissioning Engineer Coordinator – Contract Glasgow - On-site Contract Duration: Until the end of the year Level: Mid-level We are seeking a Commissioning Engineer / Coordinator to support the planning, tracking and delivery of commissioning/completions activities across multiple work packages. The role will sit between management, planning and site teams, providing clear visibility of commissioning/completions progress, priorities and upcoming activities. The successful candidate will work closely with the completions team and project planners, working with schedule information from Primavera P6 and using Excel to produce detailed trackers and work-package reports. Key Responsibilities Track and monitor commissioning activities across multiple work packages. Translate Primavera P6 schedule outputs into practical Excel trackers and reports. Monitor commissioning progress, milestones, dependencies and outstanding actions. Work closely with planners to obtain and...
IR35 Status:
Unknown Status

CV-Library Glasgow, UK Contractor
CL
Aug 08, 2026  
BMS Commissioning Engineer
I’m currently recruiting for a BMS Commissioning Engineer to join a well-established engineering company supporting a major long-term project based around the St Austell area. This is an outside IR35 contract with work expected to continue through until 2028, making it a strong option for contractors looking for long-term, stable work rather than short-term project moves. The company delivers BMS design, installation, commissioning and maintenance across a range of large-scale projects, working with blue-chip clients in sectors including data centres, aviation, life sciences and commercial buildings. They’re looking for an experienced BMS Commissioning Engineer with strong knowledge of Schneider EcoStruxure. You’ll ideally be confident writing software from scratch, carrying out full commissioning activities, and have solid industry experience within the BMS industry. Engineers don't need to be based in the area, so if you're happy travelling or staying away during the week,...
IR35 Status:
Outside IR35

CV-Library St Austell, Cornwall Contractor
CL
Jul 28, 2026  
Commissioning Engineer
Role purpose: To provide 3rd line support within the MES SPEN Project Engineering team with the ability to understand bespoke, detailed customer designs and technical ownership to the businesses high profile accounts through the utilisation of specialist technical expertise. To add value, in terms of technical skills, through the issuing of detailed network solutions as well as technical leadership and implementation support. Commissioning Engineers are responsible for Project Delivery and Integration along with Project services (Design, Build and Deploy). Key accountabilities and decision ownership: * To support the development and evolution of customers products, continuously seeking to improve the customer experience through the product lifecycle. * Documenting, carrying out administrative tasks and commissioning tasks * Receive implementation plans from Project Engineers for peer review * Assess network toplogy and circuitry for project planning * Write and...
IR35 Status:
Unknown Status

CV-Library Glasgow, Glasgow City Contractor
CL
May 12, 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
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 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
  • Follow us on:
  • Facebook
  • Twitter
  • Instagram
  • LinkedIn
  • Home
  • Contact
  • About Us
  • Terms & Conditions
  • Employer
  • Post a Job
  • Search Resumes
  • Sign in
  • Job Seeker
  • Find Jobs
  • Outside IR35
  • Create Resume
  • Sign in
© 2008-2026 Powered by SmartJobBoard Job Board Software