35 principal mechanical engineer jobs found

Principal Mechanical Engineer (Engineering and Design) Due to a continued increase in engineering and design workload in the water sector to support AMP 8 for multiple clients including United Utilities, Severn Trent, Thames Water, Southern Water, Northumbrian Water and Yorkshire Water. Role location is the Manchester office. Key Responsibilities · • To ensure compliance with Company & Client Policy with respect to water sector requirements. • To complete specific design tasks as delegated by the Project Discipline Engineer or Engineering Manager as appropriate. • To ensure work packs are delivered in timely and cost effective manner and in line with Company & Clients Project requirements and applicable Company & Client Codes and Standards. Where task forces are mobilised the team members are to be selected through the SQEP process and be familiar in the appropriate field of work. • To ensure well maintained Quality Assurance, auditable records, and technical files in...

Principal Mechanical Engineer - HVAC & Building Physics (Remote) Fully Remote £60/hr Inside IR35 12-Month Minimum Contract We're seeking an experienced Principal Mechanical Engineer to support a major defence infrastructure programme delivering critical M&E systems across Building C and Southern Services within the 10 Dock development. This is a fully remote, long-term contract opportunity focused on HVAC design, substantiation, and multidisciplinary coordination within a highly regulated environment. The Role You'll lead mechanical design activities across concept, scheme, and detailed design stages, with particular responsibility for HVAC systems supporting substation infrastructure and occupied operational spaces. Key responsibilities include: Delivery of RIBA Stage 3 and Stage 4 mechanical design HVAC and controls design for critical environments Design and substantiation of central and local ventilation systems Chilled water system design supporting electrical...

Principal Mechanical Engineer Nuclear Manufacturing Company | Near Manchester Up to £58.50 per hour | Outside IR35 4-Day Working Week (4 x 10-hour days) A specialist nuclear manufacturing company near Manchester is seeking a Principal Mechanical Engineer to support the delivery of innovative engineering solutions within a regulated industry environment. You'll play a key role in the design, compliance and delivery of complex mechanical systems, including gloveboxes and similar engineered equipment. Key Responsibilities Lead mechanical engineering design and project delivery activities Support UKCA / CE Marking compliance and technical file generation Ensure engineering solutions meet safety and regulatory standards Coordinate with multidisciplinary teams and project stakeholders Support manufacture, testing, installation and commissioning activities What We're Looking For Strong understanding of UKCA / CE Marking Experience within regulated engineering sectors Glovebox or...

We have a fantastic opportunity for an experienced Principal Mechanical Engineer to join a specialist engineering business delivering complex projects within the nuclear sector. This role will lead and supervise multidisciplinary engineering design activities, providing technical oversight and ensuring compliant, high-quality engineering solutions are delivered safely and efficiently across the full project lifecycle. This position would suit a senior Mechanical Engineer with a strong nuclear background who enjoys leading technical teams and solving complex engineering challenges. It will appeal to someone with strong calculation experience, a solid understanding of engineering compliance and extensive experience using Autodesk Inventor within regulated engineering environments. Key Responsibilities * Lead and supervise mechanical engineering design teams across complex project delivery activities * Produce and review engineering calculations, design documentation and technical...

A leading provider of nuclear solutions in the UK, specialising in clean energy, defense, and civil decommissioning, is looking for Principal Mechanical Engineer's to join their talented team. The package: Principal Mechanical Engineer Warrington - Hybrid Inside IR35 rate £60-70 per hour The role: The Principal Engineer provides leadership in the delivery of engineering and technical activities through the application of process, domain knowledge and experience. Ensure effective management of multi discipline teams to ensure timely & efficient delivery of engineering work to meet customer agreed scope Supervise engineers/technical specialists Promote effective co-operation across Engineering and other functional teams Ensure effective management of the customer, including liaison and relationship development with existing and new customers, to aid the development of business, resolution of technical and delivery issues, and such that the customer is fully briefed and...

Principal Mechanical Engineer – Water Leading Engineering Consultancy | Water Sector | Hybrid Working | Long-term Contract | Outside IR35 | Competitive Rate The Opportunity We're recruiting a Principal Mechanical Engineer to deliver high-quality mechanical engineering design and technical leadership across multiple water sector projects. You'll be responsible for leading mechanical engineering workstreams, ensuring compliance with sector standards, managing design delivery, and mentoring engineering teams. Contract Details: Outside IR35 | Competitive daily/monthly rate | Hybrid working| Long-term contract MUST HAVE: Current water sector experience. This is a senior technical role for an SQEP (Suitably Qualified Experienced Person) mechanical engineer with proven, recent expertise in water, wastewater or biosolids treatment. You'll have the capability to lead mechanical engineering on projects or groups of projects, managing design quality, timescales, cost and compliance....

Principal Mechanical Engineer Shape the Future of Our Cities and Environments Our client is seeking an experienced and dynamic Principal Mechanical Engineer to join their Design & Advanced Technology (D&AT) team. As part of a talented, multi-disciplinary group, you will be at the forefront of delivering innovative and iconic projects within the Water market. This is an opportunity to work on cutting-edge engineering projects that have a global impact, contributing to critical UK infrastructure both domestically and internationally. This role offers you the chance to make a significant impact, playing a key role in transformational programmes while delivering industry-leading solutions throughout the project lifecycle. Location: Hybrid working available (3 days per week office/site-based) Type: Contract Rate: £68 per hour Your Role As a Principal Mechanical Engineer, your responsibilities will include: ·Leading a team of Mechanical engineers in delivering technical...

Principal Mechanical Engineer Shape the Future of Our Cities and Environments Our client is seeking an experienced and dynamic Principal Mechanical Engineer to join their Design & Advanced Technology (D&AT) team. As part of a talented, multi-disciplinary group, you will be at the forefront of delivering innovative and iconic projects within the Water market. This is an opportunity to work on cutting-edge engineering projects that have a global impact, contributing to critical UK infrastructure both domestically and internationally. This role offers you the chance to make a significant impact, playing a key role in transformational programmes while delivering industry-leading solutions throughout the project lifecycle. Location: Hybrid working available (3 days per week office/site-based) Type: Contract Rate: £68 per hour Your Role As a Principal Mechanical Engineer, your responsibilities will include: ·Leading a team of Mechanical engineers in delivering technical...

An opportunity has arisen with my client for a Principal Mechanical Design Engineer to join them on a 6 -month contract. As the Principal Mechanical Design Engineer you will develop products to meet customer's needs. You will perform a range of engineering activities including progressing developmental designs into production environments and working with suppliers on technical queries. Role: Principal Mechanical Design Engineer Pay: £40 -£50 per hour via umbrella Location: Stevenage or Bristol Contract: 6months Hours: Monday - Friday, 37 hours per week Security Clearance: Security Cleared however can start on BPSS, UK Eyes only Carry out Mechanical Design and proving activities as part of a wider team for prime and variant products, of both piece parts and assemblies. Support/liaise with manufacturing, resolving manufacturing problems & defects. Support to functional & environmental testing and trials. Liaise with suppliers/purchasing to resolve any technical...

An opportunity has arisen with my client for a Principal Mechanical Design Engineer to join them on a 6 -month contract. As the Principal Mechanical Design Engineer you will develop products to meet customer's needs. You will perform a range of engineering activities including progressing developmental designs into production environments and working with suppliers on technical queries. Role: Principal Mechanical Design Engineer Pay: £40 -£50 per hour via umbrella Location: Stevenage or Bristol Contract: 6months Hours: Monday - Friday, 37 hours per week Security Clearance: Security Cleared however can start on BPSS, UK Eyes only Carry out Mechanical Design and proving activities as part of a wider team for prime and variant products, of both piece parts and assemblies. Support/liaise with manufacturing, resolving manufacturing problems & defects. Support to functional & environmental testing and trials. Liaise with suppliers/purchasing to resolve any technical...

Ready to take the lead on a high-profile mechanical engineering project within the UK’s nuclear sector? Do you have a strong background delivering engineering solutions in regulated environments? Are you confident leading design activities while collaborating across multi-disciplinary teams on complex programmes? The Opportunity An exciting contract opportunity has arisen with a leading engineering consultancy supporting a nationally significant nuclear programme. This role offers the chance to work on complex mechanical systems in a highly regulated, safety-critical environment. We would also welcome applications from these industries Defence, oil and gas, power generation, petrochemical, and aerospace sectors. This role would suit candidates working in these roles Senior Mechanical Engineer, Mechanical Design Engineer, Lead Mechanical Engineer, Project Mechanical Engineer, Mechanical Systems Engineer, Principal Mechanical Engineer, Design Engineer, Mechanical...

Overview Location: Staffordshire based Working Pattern: Hybrid Sector: Special Purpose Machinery / Highly Regulated Engineering We are seeking an experienced Principal EC&I Engineer to take technical ownership of complex special purpose machinery projects. This is a senior, hands‑off leadership role suited to someone comfortable operating with autonomy, managing projects from concept through to manufacture, commissioning and handover. While nuclear or highly regulated industry experience is desirable, we are equally open to senior EC&I professionals from a special purpose machinery background who understand high‑integrity systems, safety‑critical design and regulated delivery environments. Key Responsibilities Full technical ownership of EC&I work packages for complex machinery systems Translate design input requirements into compliant, buildable engineering solutions Lead and mentor EC&I engineers and designers across project lifecycles Deliver projects to...

Job title: Senior Mechanical Engineer (Building Services) Location: Cardiff / Swansea (Hybrid 3 days per week) Pay Rate: £51 per hour Umbrella PAYE (37.5 hours per week) Qualifications required: Degree / IEng / CEng Travelling costs expensed Notice Period: 4 weeks Contract Term:4 months (with extension) About the company Our client are ranked as one of LinkedIn's Top 25 Companies, where UK professionals want to work and stay once they join. They've also made the Times Top 50 employers for women. Their Infrastructure team uses innovation, new approaches and the power of data to help our clients deliver end-to-end projects and programmes for essential future infrastructure. And as the work becomes ever more complex, their employees continue to challenge the status quo. Our client are looking for Senior / Principal Mechanical Building Services Contract Engineer to join their growing team in Cardiff. The responsibilities of the role are: Client briefing and stakeholder...

World Class Defence Organisation based in Stevenage, Hertfordshire is currently looking to recruit a Principal Thermal Engineer Subcontractor on an initial 12 month contract.   Hourly Rate: £50.00  Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Stevenage Hybrid / Remote working: The role will likely be onsite 3 days per week. Duration: 12 Months with very likely extension. Contracts are often ongoing and long-term thereafter.  IR35 status: Inside IR35 (Umbrella) Interview process: One stage onsite interview   Principal Thermal Engineer Job Description: The Mechanical Analysis Group are looking for a Principal Thermal Engineer to join its team in Stevenage. The group consists of over 30 engineers working across a wide spectrum of cutting-edge military systems. Working for an internationally recognised company, you will play a critical role in ensuring that products deliver the necessary performance against key...

World Class Defence Organisation based in Stevenage, Hertfordshire is currently looking to recruit a Principal Structural Engineer subcontractor on an initial 12 month contract, with very likely extension.  The role will be onsite 4 days per week.     Candidates with a FE / FEA background ( Structural Engineer / Structural Analysis / Stress Engineer ) ideally from the Defence / Aerospace industry would be suitable for this position. Rate: £50.00 per hour Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Stevenage Hybrid / Remote working: The role will be onsite 4 days per week.  a 4-Day week of Monday to Thursday is possible. Duration: 12 Months with very likely extension. Contracts are often ongoing and long-term thereafter.  IR35 status: Inside IR35 (Umbrella) Interview process: One stage video interview   Principal Structural Engineer Job Description: The Mechanical Analysis Group are looking for a Principal...

We have a Project Engineer opportunity available with one of our clients from the energy sector, based in Somerset. Principal Responsibilities: The principal responsibilities of the Project Engineer – Pipework / Support Manufacturing, are as follows: Providing Engineering (Technical) support to the Package Project Management team, including attendance at weekly / monthly PM meetings. Collate and maintain support tracker to record support book releases and design holds at HO2, through to manufacturing completion at HO3. Manage change management process relating to design updates post HO2, pre-HO3. Manage the Technical Query (TQ) process for the package, including chairing regular TQ meetings with stakeholders and facilitating responses from responsible departments, as required. Ensure CEMAR is maintained to reflect TQ progress and resolutions. Manage Engineering input to HO3 requirements. Provide technical input into HO1-HO2 ‘Constructability’ issues, as required. Provide...

Electrical Project Manager – Bristol Arena Project Location: Bristol, UK Project: Bristol Arena Electrical Package Value: Approximately £20 Million Sector: Major Commercial / Entertainment Venue Reporting To: Project Director / Operations Manager Contract Type: Permanent or Contract Role Overview An experienced Electrical Project Manager is required to lead the delivery of a circa £20M electrical package on the Bristol Arena project. The successful candidate will take full responsibility for programme delivery, client management, commercial performance, health & safety, resource planning and project execution from mobilisation through to testing, commissioning and final handover. The Project Manager will act as the primary interface with YTL and other key project stakeholders while leading a team of approximately 100 site personnel, including six Engineers/Supervisors, Commissioning personnel and specialist subcontractors. Key Responsibilities * Take full responsibility...

Job Title: CE&I Responsible Engineer Work Pattern: Hybrid - 2-3 days per week Hours: 40 hours per week Security Clearance: Minimum BPSS required; must be capable of achieving SC Project: Major Infrastructure Upgrades on a Nuclear Decommissioning Site Role Summary We are seeking an experienced Control, Electrical & Instrumentation (CE&I) Responsible Engineer to support a long‑term, multi‑billion‑pound infrastructure delivery partnership within the nuclear sector. This is a senior technical leadership role, responsible for managing CE&I design and engineering activities across a diverse utilities programme on a nuclear licensed site. You will act as the technical authority for CE&I design, ensuring all solutions are safe, compliant, sustainable and delivered to programme and budget, while meeting the stringent regulatory requirements of a nuclear environment. Project Background This long‑term infrastructure partnership will deliver critical utilities...

Job Title: Principal Civil Engineer Day Rate: Up to £550 per day (outside IR35) Location: Manchester, with occasional site visits (expenses paid) Type: 12-month Contract | Full-time | Hybrid (1-2 days WFH) About the Role: You'll be leading on the design and delivery of varied water sector projects, including: Sewage treatment works upgrades Clean water main replacements IED schemes at sewage treatment works CSO upgrades and storm storage solutionsThis senior role involves steering technical excellence while working closely with both internal teams and regulated water clients. About the Client: Our client is a trusted engineering design consultancy operating across the UK rail and utilities sectors. With a solid reputation and a growing portfolio, they are known for their collaborative culture and strong values. Wellbeing is central to their ethos - they prioritise a safe, fair and positive workplace where people can do their best work. Key Responsibilities: Lead the civil...

Construction Site Supervisor Location: Bracknell, Berkshire Type: Site-based Duration: 6 months, possibility of extension Pay: Weekly pay, £25 per hour We are looking for an experienced Construction Site Supervisor (M&E) to join our team on a live construction project in Bracknell. Reporting to the Project Manager, you will take the lead on the day-to-day supervision and coordination of mechanical and electrical works, ensuring delivery is safe, compliant, on programme and to the highest quality standards. About the Role You will be responsible for overseeing M&E installation activities on site, working closely with subcontractors, designers and the principal contractor team to ensure smooth delivery from first fix through to commissioning and handover. Key Responsibilities Supervise and coordinate M&E installation works, including HVAC, pipework, plumbing, electrical containment, cabling and plant installation Ensure works are carried out in line with...