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Outside IR35 commissioning engineer

27 commissioning engineer jobs found

CL
Aug 01, 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
Jul 31, 2026  
BMS Commissioning Engineer
BMS Commissioning Engineer Cardiff 9-Month Contract Outside IR35 Requirements: 5+ years' BMS commissioning experience Strong knowledge of HVAC systems and BMS principles Experience with BMS platforms Proven experience delivering commissioning projects ECS/CSCS Card (or equivalent) SMSTS or SSSTS SIS Modbus Certification If this is of interest, please get in touch for more information
IR35 Status:
Outside IR35

CV-Library Cardiff, 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 Birmingham, West Midlands 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 28, 2026  
Lead Mechanical Commissioning Engineer
Astute's Power Team are partnering with a Leading EPC Contractor within the Energy Sector. We are currently recruiting for a Lead Mechanical Commissioning Engineer to join their Combined Cycle Gas Turbine plant based in Adamow, Poland. The Lead Mechanical Commissioning Engineer position comes with a day rate from €500.00 to €550.00 per day outside of IR35. Role responsibilities and key skills for the role: * Lead and coordinate all mechanical commissioning activities associated with the CCGT power plant, ensuring safe, efficient and timely delivery in line with the overall commissioning programme and key project milestones. * Develop, review and execute detailed mechanical commissioning plans, procedures and system turnover strategies, ensuring activities are correctly sequenced and aligned with the wider project commissioning schedule. * Lead the pre-commissioning and commissioning of major mechanical plant and systems, including gas turbines, steam turbines, HRSGs, steam and...
IR35 Status:
Outside IR35

CV-Library Turek, Greater Poland Contractor
CL
Jul 27, 2026  
Lead Electrical Commissioning Engineer
Astute's Power Team are partnering with a Leading EPC Contractor within the Energy Sector. We are currently recruiting for a Lead Electrical Commissioning Engineer to join their Combined Cycle Gas Turbine plant based in Adamow, Poland. The Lead Electrical Commissioning Engineer position comes with a day rate from €500.00 to €550.00 per day outside of IR35. Role responsibilities and key skills for the role: Lead and coordinate all high-voltage (HV) commissioning activities associated with the 600MW CCGT plant, ensuring safe, compliant, and efficient delivery in line with project milestones. Execute detailed HV commissioning plans, switching schedules, and energisation procedures, aligned with the overall project commissioning strategy and grid connection programme. Supervise and manage pre-commissioning and commissioning of HV systems, including GIS/AIS switchgear, power transformers, generator step-up (GSU) transformers, protection & control systems, and grid interface...
IR35 Status:
Outside IR35

CV-Library Turek, Greater Poland Contractor
CL
Jul 26, 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
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
CL
Jul 29, 2026  
BESS Electrical Engineer
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 contract extension and/or a permanent opportunity after the initial assignment. This is not a routine design-office role. It is a live, high-priority BESS project where your electrical design and commissioning experience will make an immediate impact. You will be joining at the point where the project needs...
IR35 Status:
Outside IR35

CV-Library G1, Glasgow, Glasgow City 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 role 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...
IR35 Status:
Outside IR35

CV-Library Edinburgh, City of Edinburgh 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 role 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...
IR35 Status:
Outside IR35

CV-Library M1, Manchester, Greater Manchester 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 role 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...
IR35 Status:
Outside IR35

CV-Library M1, Manchester, Greater Manchester 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 role 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...
IR35 Status:
Outside IR35

CV-Library Dublin, Dublin City 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
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
Aug 02, 2026  
Senior Project Engineer / Engineering Lead
Senior Project Engineer / Engineering Lead Water & Wastewater £450pd - £650pd DOE (Outside IR35) Hybrid - 3 days in office Contract Length: 1-2 years Location: North West - commutable from Lancaster, Preston and surrounding areas Are you a technically strong Water or Wastewater Engineer with experience across treatment works, feasibility, design development and technical assurance looking for a long-term contract opportunity? Are you looking for a role where you can genuinely influence engineering solutions, challenge designs and support projects from early-stage development through to construction and commissioning? This is an excellent opportunity to support a major programme of water and wastewater projects across the North West. Opportunities are available at Senior Project Engineer through to Engineering Lead level, depending on experience. The successful candidate will have a strong technical background within water or wastewater and experience developing,...
IR35 Status:
Outside IR35

CV-Library Lancaster, Lancashire Contractor
CL
Aug 01, 2026  
Electrical Authorised Person
We have an exciting opportunity for an Electrical Authorised Person based with our Client in Reading, Berkshire. SC Security Clearance is required for this role, Candidates must be sole British Citizens with British Passport and not have worked outside the UK during the past 5 years. Market rates - opportunity to work outside IR35 ROLE OVERVIEW The overarching responsibility of the AP is to manage and co-ordinate Electrical safety against the approved project procedures. This will include day to day co-ordination of the Electrical AP's, provide due governance and management to meet the Nuclear Licence Conditions, QMS and Project Delivery processes and procedures. QUALIFICATIONS / PROFESSIONAL MEMBERSHIPS - Time served Electrical technician or electrical engineer with onsite experience - 17th / 18th Edition IET Electrical Regulations - Hold electrical testing qualifications (2391 or 2394 & 2395) and have undertaken - AP (E) Training - SMSTS (or equivalent...
IR35 Status:
Outside IR35

CV-Library Reading, UK Contractor
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