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 73 Outside IR35 22 Inside IR35 17
Refine by Categories
Engineering 62 Construction 29 Other 9 Information Technology 3 Management 2 Manufacturing 2
General Labor 1
More
Refine by Job Type
Contractor 112
mechanical commissioning technician

112 mechanical commissioning technician jobs found

CL
Aug 15, 2026  
Senior Test Technician
Senior Test Technician - (phone number removed) - £23.69/hr (Umbrella Rate - Inside IR35) Step into a rewarding hands-on engineering role with real responsibility, variety, and clear impact. This is a confirmed inside IR35 Senior Test Technician role offering an umbrella rate of £23.69 per hour, working on combustion engine testbeds within the advanced propulsion and test engineering industry. If practical problem-solving, safe operations, and keeping sophisticated test systems running at peak performance are what drive motivation, then the Senior Test Technician position is built for you. What You Will Do: · Operate multi-cylinder engine test beds day to day, keeping test rigs safe and ready through routine test cell checks. · Lead installation and validation of instrumentation and equipment, supporting steady state, transient, emissions, calibration and durability activities. · Troubleshoot mechanical, electrical, rig and measurement issues as first line diagnosis, working...
IR35 Status:
Inside IR35

CV-Library Coventry, UK Contractor
CL
Aug 15, 2026  
Engine Test Technician
Our OEM Client based on the Warwick University campus in Coventry is searching for an Engine Test Technician to join their team, Inside IR35. This is a contract position with a proposed end date of 31st March 2027. Umbrella Pay Rate: £23.60 per hour. Key Responsibilities: Lead the day‑to‑day operation of multi‑cylinder engine testbeds, ensuring safe, test‑ready rigs through routine test cell checks and the installation and validation of instrumentation and equipment. Support engineers with steady‑state, transient, emissions, calibration, and durability test activities. Perform first‑line diagnosis and troubleshooting for mechanical, electrical, rig, and measurement issues. Operate AVL PUMA, ETAS INCA, and related tools at an operational level to run test steps and verify channel integrity. Assist with hardware changes, including injectors, sensors, turbo components, exhaust parts, hoses, and fuel system items. Maintain testbed readiness while driving continuous improvements in...
IR35 Status:
Inside IR35

CV-Library Coventry, UK Contractor
CL
Aug 14, 2026  
Field Service Technician - 6 Month FTC
H-Power is a UK-based, AIM-listed clean energy company developing zero-emissions hydrogen power systems. Using ammonia to produce low-carbon hydrogen at the point of need, and fuel cells to convert it into reliable, off-grid power, H-Power offers a scalable, practical alternative to fossil fuels, serving construction, infrastructure, transport and power generation sectors. Behind the technology is a team driven by a shared purpose: to accelerate the shift away from fossil fuels. The Role... 6-Month Fixed-Term Contract As a Deployment Technician, you will join H-Power on a 6-month fixed-term contract, supporting a growing programme of customer deployments across the UK and internationally. This is a hands-on, customer-facing field service role responsible for installing, commissioning, operating and supporting H-Power's hydrogen fuel cell systems during an exciting period of commercial growth. Working closely with the existing Deployment Team, you'll support live customer...
IR35 Status:
Unknown Status

CV-Library GU6 8TB, GU6 8TB Cranleigh, United Kingdom Contractor
CL
May 24, 2026  
Test Technician
TXM Recruit are currently looking to put a team of Test Technicians together on a contract basis for a rail client in Milton Keynes. The team will be performing test and commissioning on various fleets of rolling stock vehicles. Job Title – Test Technician. General Description: Skilled work within a safety critical role which demands a standard of competence necessitating either an apprenticeship to a trade or recognised training programme where an employee is required to be fully qualified in all parts of the trade and capable of producing work to the required standards, specification or finish expected of a Test Technician. To perform defined tasks to written instructions and to be able to work to their own initiative to enable the Depot to provide a quality service to the business. Carry out functional testing and commissioning of EMU/DMU and other rolling stock types of post works to a defined and written standard in line with UK rail safety regulations. Lead fault...
IR35 Status:
Unknown Status

CV-Library Milton Keynes, UK Contractor
CL
Aug 16, 2026  
M&E Site Manager
MEP Site Manager Wakefield Chiller Upgrades Start 10th August - 12 months We have a current role available for a Site Manager to join the team on a £40m data centre refurbishment project near Wakefield. You will be joining the main contractor and will be responsible for the day to day site based activities including: * Oversee MEP installations on-site, coordinating mechanical, electrical, and plumbing works to align with project programs and specifications. * Manage subcontractors, engineers, and site teams to maintain top-quality workmanship and compliance with HSE standards. * Liaise with project managers, design teams, and clients to resolve technical issues and keep project on track. * Conduct regular site inspections, progress meetings, and performance reports. * Ensure all testing, commissioning, and handover documentation is completed to the highest standard. This is a 12 month contract with the opportunity of an extension. You will be overseeing...
IR35 Status:
Unknown Status

CV-Library WF1, Wakefield, West Yorkshire Contractor
CL
Aug 16, 2026  
Electrical Project Manager
Electrical Project Manager Thames Valley Park, Reading (RG6) £375 - £425 per day (Outside IR35) Long-Term Contract | September Start The Opportunity We are recruiting on behalf of a growing M&E contractor with an excellent reputation for delivering high-quality commercial fit-out and refurbishment projects across the South East. Due to continued growth, our client is looking to appoint an experienced Electrical Project Manager to lead the electrical delivery of a £3.5 million CAT B commercial fit-out at Thames Valley Park, Reading. The project comprises a CAT B fit-out across three floors delivered over three phases, offering an excellent opportunity to join a collaborative business with a strong pipeline of future work. Following the successful completion of this project, there will be opportunities to work on specialist laboratory refurbishments and office-to-lab conversion projects across Oxfordshire. The Role Reporting to the Head of Operations, you will take...
IR35 Status:
Outside IR35

CV-Library Reading, Berkshire Contractor
CL
Aug 16, 2026  
Manufacturing Engineer
World Class Defence Organisation based in Bolton is currently looking to recruit a Manufacturing Engineer. The department are looking for candidates with skills in the following: Verification & validation, design modifications, commissioning, FMEAs, configuration control, sub-assembly manufacturing.   Rate: £35.00 per hour Location: Bolton Contract: 37 Hours per week Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Duration: 12 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella)   Manufacturing Engineer Job Description: As a Manufacturing Engineer within the unit & missile assembly manufacturing facility your focus will be to ensure that our products are built efficiently and to budget. A key member of the Manufacturing Engineering team, you will carry out activities in support of multi-project manufacturing. Compilation and update of Manufacturing Instructions. Design, Commissioning and...
IR35 Status:
Inside IR35

CV-Library Bolton, UK Contractor
CL
Aug 16, 2026  
People Security Adviser
People Security Adviser Inside IR35 - £450 p/d Remote - once a month travel into London Active SC Mandatory We are looking for an experienced People Security Adviser to support the development and maturation of a newly established security function within a large, complex organisation. This role will play a key part in designing and embedding modern people security capabilities, integrating personnel security across physical security, cyber security, identity and access management, HR, fraud prevention and wider business operations. The successful candidate will help develop security policy, manage insider risk, deliver investigations and assurance activities, and drive continuous improvement across people security. Key Responsibilities Support the design, implementation and delivery of People and Physical Security capability improvement programmes. Develop, maintain and enhance people security policies, standards, procedures, controls and guidance. Provide subject matter...
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
CL
Aug 16, 2026  
Server Engineer
Server Engineer – SC Cleared | Windows Server | PowerShell | VMware Active SC Clearance is essential for this opportunity. Are you an experienced Server Engineer with expertise in Windows Server, PowerShell scripting, VMware, and server build and decommissioning? We're recruiting on behalf of a leading organisation within the Financial Services sector seeking an engineer to support and enhance its enterprise server infrastructure. This is an excellent opportunity to join a collaborative infrastructure team, working in a secure enterprise environment where you'll be responsible for maintaining business-critical systems while contributing to infrastructure upgrades and transformation projects. Location: Central London (2–3 days onsite per week) Key Responsibilities Build, configure, deploy, maintain, and decommission both physical and virtual Windows Servers. Manage and support enterprise Microsoft Windows Server environments, ensuring high availability, security, and...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
Aug 16, 2026  
Commissioning Manager
Commissioning Manager – Energy from Waste / High Temperature Incineration – County Durham – 5 Month Contract – Outside IR35 – £(Apply online only)/day Samuel Frank is recruiting for an experienced Commissioning Manager to lead the commissioning programme on a major Energy from Waste / High Temperature Incineration (HTI) facility in County Durham who has experience of combustion commissioning. This is a 5-month contract, deemed to fall outside of IR35, with a day rate of £(Apply online only) depending on experience. The project runs from mid-to-late August through to December/January and requires someone who can take ownership of commissioning from mechanical completion through to final performance testing and operational handover. This is not a role for someone who has only supported commissioning. The successful Commissioning Manager will have a proven track record of leading commissioning activities on complex process plants and be comfortable taking technical and programme...
IR35 Status:
Outside IR35

CV-Library DL1, Haughton le Skerne, Darlington Contractor
CL
Aug 16, 2026  
Life Safety Systems Manager
Life Safety Systems Manager Location: Weybridge - Hybrid 3 days office / 2 days home Contract: 3-6 Months Rate: £(Apply online only) per day (Inside IR35) Security Clearance: Active SC Clearance Closing Date CV Deadline: 28th July COP (4pm) Life Safety Systems Manager – Defra Charlton Recruitment is recruiting on behalf of Defra for an experienced Life Safety Systems Manager to join a specialist team on an initial 6-month contract. This is an excellent opportunity to play a pivotal role in ensuring the safety, compliance, and operational resilience of life safety systems across one of the UK's most complex scientific estates. Working from Defra’s Weybridge site houses the Animal and Plant Health Agency central laboratories, serving as the UK's primary scientific facility for animal health, disease surveillance, and the upcoming National Biosecurity Centre, you will provide technical leadership and governance across high-risk environments where safety, compliance, and operational...
IR35 Status:
Inside IR35

CV-Library KT15, New Haw, Surrey 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  
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
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  
Health and Safety Manager
We are seeking an experienced Health and Safety Manager to provide technical leadership and assurance for critical life safety systems within a complex, high-risk environment. The role is responsible for ensuring compliance, reliability, and operational readiness of systems including fire detection, fire suppression, emergency lighting, smoke control, confined space safety systems, and emergency egress infrastructure. Key Responsibilities ·       Act as the Subject Matter Expert (SME) for life safety systems. ·       Lead compliance, governance, and assurance activities in line with statutory and regulatory requirements. ·       Manage the lifecycle of life safety systems, including maintenance, testing, validation, installation, and commissioning. ·       Conduct technical audits, inspections, and risk assessments. ·       Lead incident investigations and provide root cause analysis and recommendations. ·       Review and approve designs, modifications, and new...
IR35 Status:
Unknown Status

CV-Library United Kingdom Contractor
CL
Aug 16, 2026  
Senior CS&A Engineer
We have a fantastic opportunity for an experienced Senior CS&A Engineer to join a major nuclear infrastructure programme supporting the refurbishment of a critical facility on the Sellafield site. Working alongside an experienced engineering team, you'll support the delivery of civil and structural engineering solutions across the design, construction and commissioning phases of this high-profile project. This role can be done remotely with 1 day a week from Warrington or Cumbria. This position would suit a Civil or Structural Engineer with previous nuclear experience who enjoys technically challenging projects within highly regulated environments. It will appeal to someone who is comfortable producing engineering designs, calculations and technical documentation while supporting project delivery across multidisciplinary teams. Key Responsibilities * Produce civil and structural engineering designs, calculations and technical reports * Support project delivery throughout...
IR35 Status:
Unknown Status

CV-Library Warrington, Cheshire Contractor
CL
Aug 16, 2026  
Life Safety Systems Manager
For our client in the public sector, we are looking for an experienced Life Safety Systems Manager to take the technical lead for a large, highly regulated science estate in Weybridge. Key details at a glance Role: Life Safety Systems Manager Day rate: Up to £585 per day (umbrella) Contract length: 3-6 months IR35: Inside Location: Weybridge science estate - 3 days onsite, 2 days WFH per week Clearance: SC clearance highly preferred Interview: 1 stage via MS Teams The impact you would have This position is the subject matter expert and technical authority for life safety systems across a complex science campus and wider estate. You would be ensuring that critical assets remain safe, compliant, resilient and aligned with statutory and industry best practice. Main responsibilities Act as the technical lead and SME for all life safety systems across the estate. Provide governance, assurance and compliance oversight for critical life safety infrastructure. Lead the management...
IR35 Status:
Inside IR35

CV-Library Weybridge, Surrey Contractor
CL
Aug 16, 2026  
Site Technician (Nuclear waste & Decommissioning)
Waste & Decommissioning Technician CCL Global is recruiting for multiple Waste & Decommissioning Technicians to support a major long-term nuclear waste management programme based in Oxfordshire. This is an excellent opportunity to join a growing operation responsible for the safe handling, storage and movement of radioactive waste packages within a highly regulated nuclear environment. Location: Oxfordshire Contract type: 12-Month Contract (insider IR35) Shift Pattern: Days per Week (9.25-hour shifts) Key Responsibilities * Safe handling, movement and storage of radioactive waste packages. * Operate overhead cranes and support lifting operations. * Record and track waste movements using site systems. * Assist with waste processing, packaging and storage activities. * Carry out basic equipment maintenance and housekeeping. * Support routine decontamination and waste management operations. * Work safely in accordance with nuclear safety, HSE and quality...
IR35 Status:
Unknown Status

CV-Library Clifton Hampden, Oxfordshire Contractor
CL
Aug 15, 2026  
M+E manager
My client is a renowned Uk and overseas main contractor on projects from £ 10 - 500 million in value from mixed use town centre developments to student accommodation , hospitals , offices and complex civil engineering projects on some of the most iconic buildings in the country . The project is in excess of £ 75 million in value and candidates must have experience of working start to finish on complex schemes for main contractors on high M+E value projects from initial design and technical areas though to the QA and delivery of the sub-contractor works across the scheme through to commissioning stages . This is a live project and working with the growing team you will be pivotal and the lead Mechanical and electrical services for the project working alongside the Project Director Design and Commercial leads for the scheme Requirements including certificates and qualifications: Candidates must ideally have UK main contractor experience of starting and delivering...
IR35 Status:
Unknown Status

CV-Library Bournemouth, Dorset Contractor
CL
Aug 15, 2026  
Senior Mechanical Engineer
Job Title: Senior Mechanical Engineer Summary We are looking for an experienced Senior Mechanical Engineer to join a critical programme at Sellafield, Cumbria. This role involves supporting the Plant Facing Design Office in delivering innovative engineering retrievals and operations programme. Ideal for professionals with strong mechanical design expertise in regulated environments, this contract offers an exciting opportunity on a major infrastructure project. Salary: Competitive Location and Working Pattern Sellafield, Cumbria – Full-time, Monday to Friday, 40 hours per week Client Overview Our client is a reputable organisation involved in large-scale, complex engineering projects in the nuclear sector, recognised for prioritising safety, quality, and technical excellence. Responsibilities * Develop mechanical tooling and engineering solutions for project requirements. * Produce comprehensive engineering design packages, including drawings, specifications, and substantiation...
IR35 Status:
Unknown Status

CV-Library Sellafield, Cumbria 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