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Contractor 90
Construction mechanical project engineer

90 mechanical project engineer jobs found

CL
Aug 12, 2026  
Senior Mechanical Project Engineer
One of London’s leading Building Services contractors is actively seeking a Senior Mechanical Project Engineer for a new landmark high rise residential scheme in South East London. This contractor is most prominent in commercial and residential sectors and are widely rapidly becoming one of the go to specialists in the industry, having built strong relationships with several of the tier 1 developers and contractors. As Senior Mechanical Project Engineer you will be number one on site overseeing the delivery of a £12m mechanical install, reporting directly to a Senior PM. This project is a flagship scheme for one of their longest standing clients, a market leading and widely recognised developer. Besides the chance to add a flagship project to your resume, this is a fantastic opportunity for an ambitious Engineer to fast track their career towards Project Manager level. With a lean management business model, this contractor will allow you to quickly climb the ladder and give you the...
IR35 Status:
Unknown Status

CV-Library Tower Hill, Greater London 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 - 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  
Principal Mechanical Engineer
We are currently recruiting for an experienced Senior / Principal Mechanical Building Services Engineer to join a leading multidisciplinary engineering consultancy on a 12-month contract based in Cardiff or Swansea. This is an excellent opportunity to become part of a collaborative team delivering innovative mechanical building services solutions across a diverse portfolio of projects. You'll work on technically challenging schemes, engage with high-profile clients and contribute to the successful delivery of sustainable engineering solutions across multiple sectors. If you're looking for a role that combines technical leadership, client engagement and project delivery within a flexible working environment, we'd like to hear from you. The Role As a Senior / Principal Mechanical Building Services Engineer, you will take a leading role in the design and delivery of mechanical building services projects from concept through to completion. Working closely with multidisciplinary...
IR35 Status:
Unknown Status

CV-Library Swansea, 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 20, 2026  
Site Construction Manager
Site Construction Manager - Power Generation Project Teesside (Site Based) 18-24 Month Contract | Outside IR35 Day Rate: Attractive DOE For more details contact: Adam Mayne - (url removed) | (phone number removed) Site Construction Manager - Power Generation   Are you an experienced Construction Manager with a background delivering mechanical and electrical installation projects within industrial, energy, process, utilities, power generation or heavy engineering environments? This is an opportunity to play a key role on a major £36m power generation project being delivered for a globally recognised industrial energy operator on Teesside.   Working for one of the UK's leading specialists in distributed energy, power generation and battery energy storage solutions, you'll take responsibility for coordinating and overseeing construction activities on a significant gas engine power generation installation.   Working closely with the Project Manager and Project Engineer,...
IR35 Status:
Outside IR35

CV-Library Middlesbrough, UK Contractor
CL
Aug 19, 2026  
HVAC Engineer
Clements Young are currently recruiting for an experienced HVAC Engineer to join a commercial installation project in Sleaford. This is a great opportunity for an engineer with strong installation experience to work on a fast-paced commercial project with an immediate start. Duties will include: * Installation of air conditioning systems * Installation of MVHR (Mechanical Ventilation with Heat Recovery) systems * Mounting and installing HVAC units * Installing cable trays and associated containment * Installing pipework and connections to HVAC equipment * Working to site drawings and project specifications * Maintaining high standards of workmanship and health & safety Requirements: * Previous experience as an HVAC Engineer or HVAC Installer is essential * NVQ Level 2 (or equivalent) in a relevant trade is beneficial but not essential * Relevant site experience is more important than formal qualifications * Ability to work independently and...
IR35 Status:
Unknown Status

CV-Library NG34, Sleaford, Lincolnshire Contractor
CL
Aug 19, 2026  
Mechanical Site Engineer
Role: Mechanical Site Engineer – Utility Scale Solar Location: Epping (Essex) Start: ASAP Mint Selection are partnered with a leading EPC contractor delivering utility-scale solar projects across the UK and are looking to recruit an experienced Mechanical Site Engineer to support the successful delivery of a major ground-mounted solar PV project. We are looking to speak with Mechanical Site Engineers who have a proven track record of delivering large-scale solar projects, with experience managing mechanical subcontractors, driving quality standards and supporting construction through to mechanical completion and handover. Scope of Work * Support the safe and successful delivery of a large utility-scale solar PV project, ensuring works are completed in line with programme, quality and HSEQ requirements. * Manage and coordinate mechanical subcontractors throughout the construction phase. * Supervise the installation of piling, mounting structures, trackers (where...
IR35 Status:
Outside IR35

CV-Library Epping, Essex Contractor
CL
Aug 19, 2026  
Mechanical Site Engineer
Role: Mechanical Site Engineer – Utility Scale Solar Location: Northamptonshire / Bedfordshire Mint Selection are partnered with a leading EPC contractor delivering utility-scale solar projects across the UK and are looking to recruit an experienced Mechanical Site Engineer to support the successful delivery of a major ground-mounted solar PV project. We are looking to speak with Mechanical Site Engineers who have a proven track record of delivering large-scale solar projects, with experience managing mechanical subcontractors, driving quality standards and supporting construction through to mechanical completion and handover. Scope of Work * Support the safe and successful delivery of a large utility-scale solar PV project, ensuring works are completed in line with programme, quality and HSEQ requirements. * Manage and coordinate mechanical subcontractors throughout the construction phase. * Supervise the installation of piling, mounting structures, trackers (where...
IR35 Status:
Outside IR35

CV-Library Bedford, Bedfordshire Contractor
CL
Jun 28, 2026  
Senior HVAC Design Engineer
Data Centres are crucial components of today's infrastructure, supporting everything from business to public services. 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 a Senior Mechanical Engineer your role will be as part of an interdisciplinary team lead the design of mechanical systems (Building servies and cooling) on medium to large-scale Mission Critical projects through all design stages from Concept to Construction Supervision and Hand-Over Lead the preparation and review of design deliverables Lead projects and work closely with our data centre clients to deliver quality work to meet their specific needs Present technical content for review by technical and non-technical...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
May 16, 2026  
Senior Electrical Design Engineer
An excellent opportunity has arisen for an experienced Electrical Design Engineer to join a well-established building services consultancy in London on an contract basis outside IR35. This hybrid role will involve working as part of a multidisciplinary building services engineering team, supporting the delivery of electrical design solutions across a range of building projects. The successful Electrical Design Engineer will contribute to the development of electrical building services designs, technical documentation and coordinated BIM models. This role is based in the London office with hybrid working available, offering the chance to work on high-quality building services projects alongside experienced engineers and consultants. Key Responsibilities · As an Electrical Design Engineer, your responsibilities will include: · Producing electrical building services designs for a variety of building projects · Developing electrical schematics, layouts and...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Aug 23, 2026  
Senior P6 Planner
Job Title: Senior P6 Planner Rate: £500 per day Limited or PAYE Umbrella Hybrid Working (Site & Remote) We are seeking an experienced Senior Planner to provide specialist programme development and strategic planning support across a portfolio of multidisciplinary civil engineering and infrastructure upgrade schemes. This role is ideal for a highly capable planner who can work autonomously, develop accurate and logic-driven construction programmes, and provide clear schedule intelligence to support effective project delivery. The Role You will take responsibility for the creation, development, and maintenance of detailed construction programmes using Primavera P6. Working closely with delivery and engineering teams, you will ensure programmes accurately reflect construction methodology, sequencing, and live site constraints. Key responsibilities include: Producing, developing, and maintaining fully logic-linked baseline programmes Creating and integrating...
IR35 Status:
Unknown Status

CV-Library Windlesham, UK Contractor
CL
Aug 23, 2026  
Site Engineer
The Client and Project: My client is a leading RC frame sub-contractor who are currently recruiting a Site Engineer to complete a month scheme You will be required to manage all the setting out of an RC frame and groundworks package. Site Engineer Responsibilities: * Reporting to and working with the Project Manager and foreman. * Liaising with main contractor site team. * Site set up and compliance with health and safety. * Completing all setting out associated to the RC frame and groundworks package. * Raising technical queries on design issues. * Management of temporary works. Site Engineer Requirements: * CSCS card. * Must have previous experience setting out RC frames and groundworks. * Temporary works ticket. * Degree in civil engineering/construction or time served The Next Steps: To apply for the role as a Site Engineer, click on the apply now button below and submit your CV for further information
IR35 Status:
Unknown Status

CV-Library Richmond upon Thames, Greater London Contractor
CL
Aug 23, 2026  
CSA Construction Manager - Data Centre
CSA Construction Manager Data Centre | Essex | Freelance £400 - £500 per day This is a role for a CSA Construction Manager who understands that data centre delivery is won or lost in the details. You will be joining a major data centre scheme where the civil, structural and architectural works need to be properly managed around a fast-moving M&E programme. This is not a straightforward build package where you can work in isolation. Every opening, plinth, riser, fire stop, access route, floor, wall, door and finish has a knock-on effect on mechanical, electrical, commissioning and handover. The project needs someone who can take ownership on site, manage subcontractors properly and keep the CSA works moving without creating problems for the wider delivery team. You will be working closely with the project management team, M&E package leads, engineers, design managers, QA teams, commissioning teams and subcontractors. The job will suit someone who is comfortable walking...
IR35 Status:
Unknown Status

CV-Library Harlow, Essex Contractor
CL
Aug 23, 2026  
Civils Supervisor
Job Opportunity: Civils Site Supervisor Location: Teesside Hours: Full-time (40+ hours per week, Monday - Friday) Payment Model: Weekly CIS Duration: Ongoing contract The Opportunity Are you an experienced Civil Engineering Supervisor looking to manage high-volume infrastructure and groundworks operations across Teesside? Search Consultancy is recruiting a proven Civils Site Supervisor to oversee day-to-day site operations on a major civil engineering project in Teesside. Working closely with project managers and site engineers, this role offers long-term stability and project continuity for a strong operational leader who knows how to drive plant, groundworks gangs, and sub-contractors safely and efficiently. If you hold a valid SSSTS or SMSTS with a Gold or Black CSCS card, have a robust background in heavy civils, and want a key supervisory role with a premier regional contractor, we want to hear from you. Your Role & Responsibilities Reporting to the Senior...
IR35 Status:
Unknown Status

CV-Library Middlesbrough, North Yorkshire Contractor
CL
Aug 23, 2026  
Site Engineer
My client is a leading contractor in the Steel frame and Groundworks sector. We are currently recruiting a Site Engineer to complete an 12 month contract. You will be required to manage the engineering, including the setting out of the ground works/steel frame package. Site Engineer Responsibilities: • Reporting and working with the Project Manager and foreman. • Site set up and compliance with health and safety • Completing all setting out associated to the ground works and steel Frame aspects. • Raising technical queries on design issues. Site Engineer Requirements: • CSCS card. • SMSTS or SSSTS – Desirable, not essential. • Previous experience setting out ground works and drainage. • Degree in Civil Engineering or Time Served. The Next Steps: To apply for the role as a Site Engineer, click on the apply now button below and submit your CV for further information
IR35 Status:
Unknown Status

CV-Library DA1, Hawley, Kent Contractor
CL
Aug 23, 2026  
Flood Water Management and Drainage Engineer
Your new company A Local Authority in Hampshire is seeking an experienced Infrastructure & Design Engineer to support the design and delivery of drainage and flood risk management schemes across a diverse portfolio of projects. This is an excellent opportunity to join a growing team working on technically challenging infrastructure projects while helping to mentor and develop junior engineers. Your new role As an Infrastructure & Design Engineer, you will play a key role in the development and delivery of drainage and civil engineering solutions from concept through to detailed design. Working closely with clients, stakeholders and internal teams, you will produce high-quality engineering designs and technical outputs while supporting the professional development of less experienced team members. Key responsibilities will include: Designing and delivering drainage and flood water management schemes for a range of infrastructure and development projects. Producing...
IR35 Status:
Unknown Status

CV-Library Winchester, Hampshire Contractor
CL
Aug 23, 2026  
Site Engineer
The Client and Project: My client is a leading RC frame sub-contractor who are currently recruiting a Site Engineer to complete an 8 month scheme in Cardiff. You will be required to manage all the setting out of an RC frame and groundworks package. Site Engineer Responsibilities: * Reporting to and working with the Project Manager and foreman. * Liaising with main contractor site team. * Site set up and compliance with health and safety. * Completing all setting out associated to the RC frame and groundworks package. * Raising technical queries on design issues. * Management of temporary works. Site Engineer Requirements: * CSCS card. * Must have previous experience setting out RC frames and groundworks. * Temporary works ticket. * Degree in civil engineering/construction or time served The Next Steps: To apply for the role as a Site Engineer, click on the apply now button below and submit your CV for further information
IR35 Status:
Unknown Status

CV-Library Cardiff, South Glamorgan Contractor
CL
Aug 23, 2026  
Freelance Setting Out Site Engineer
Freelance Setting Out Site Engineer Isle of Wight £400 per day + Travel, Accommodation and Expenses 26-Week Contract | Starting Early–Mid September A well-established construction and engineering contractor is seeking an experienced Freelance Setting Out Site Engineer to support the delivery of a light industrial construction project on the Isle of Wight. This is a site-based contract expected to run for approximately 26 weeks, with a planned start in early to mid-September. The successful candidate will take responsibility for setting out works accurately, supporting the site team with engineering requirements and ensuring construction activities are delivered in accordance with approved drawings, specifications and programme requirements. The role will suit an experienced Site Engineer who has worked on light industrial, industrial, warehouse, logistics or similar construction projects and is comfortable working independently using their own setting-out equipment....
IR35 Status:
Unknown Status

CV-Library Isle of Wight, United Kingdom Contractor
CL
Aug 23, 2026  
Electrical Project Manager
Leading, established and highly successful provider of mechanical and electrical installation services to commercial and industrial buildings seek the solid appointment of an experienced and commercially talented Electrical Project Manager from an M&E / Building Services electrical installation project management background to join their exciting planned growth and continued success. Candidates sought MUST be commutable to Kettering and site based here. You will ideally have previous experience working on projects from £10M - £20M although we may still give consideration to those under this depending on your experience and projects exposure. We seek a true professional with experience in high voltage installation projects. Paramount is your experience working on commercial and industrial schemes. Candidates highly sought after are those from an M&E / Building Services background, ideally with direct working experience in the project management and delivery of electrical...
IR35 Status:
Unknown Status

CV-Library Kettering, North Northamptonshire Contractor
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