20 principal mechanical engineer jobs found

Principal Mechanical Engineer - Low Carbon Location: Remote with occasional visits to the office for project meetings Team: Energy Transition Shape the future of low‑carbon energy! We're looking for a Principal Mechanical Engineer to join our client's growing Energy Transition Team and play a leading role in delivering the next generation of low‑ and zero‑carbon energy projects. If you thrive on solving complex engineering challenges and want to influence the UK's transition to cleaner energy, this is a role where your impact will be felt for decades. About the Role As a senior member of a multidisciplinary engineering group, you will lead the development of mechanical designs across a diverse portfolio of energy projects - from early‑stage concept work through to construction, operation and eventual decommissioning. The work spans: Conventional power generation Energy‑from‑waste facilities Industrial energy systems Carbon capture, utilisation and storage (CCUS) Future...

Overview A leading engineering organisation is seeking an experienced Piping Stress Engineer to support a major nuclear civil decommissioning programme. This role is central to ensuring safe, compliant, and efficient piping system design within a highly regulated environment. The successful candidate will collaborate closely with multidiscipline engineering teams, providing technical expertise across stress analysis, flexibility assessment, support design, and compliance verification. Key Responsibilities Stress & Flexibility Analysis Identify stress-critical lines through detailed review of P&IDs and line lists. Perform piping stress analysis using recognised industry software (e.g., CAESAR II / AutoPIPE). Evaluate nozzle loads, support loading, thermal expansion, vibration issues, and system flexibility. Conduct static and dynamic analyses, ensuring systems meet functional, safety, and engineering design requirements. Design & Technical Review Review and...

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...

Are you an experienced Mechanical Engineer looking to take the lead on complex engineering challenges? Can you deliver robust mechanical design solutions across a range of high-integrity systems? Do you thrive when solving technical problems and guiding others in best engineering practice? The Opportunity This is an excellent chance to join a leading engineering consultancy, working on technically varied mechanical engineering work packages. You’ll play a key role in developing safe, efficient, fit-for?purpose design solutions while supporting both senior stakeholders and less-experienced team members. We would also welcome applications from these industries Nuclear, defence, energy infrastructure, heavy industrial engineering, or manufacturing. This role would suit candidates working in these roles Senior Mechanical Engineer, Mechanical Design Engineer, Mechanical Handling Engineer, Lifting Equipment Engineer, Principal Mechanical Engineer, Systems Engineer, Project...

Our Pharma client is looking for an engineer to join them for a 6-8 month FTC. ideally you would come from a manuvfacturing environment, pharma, food, aerospace, any industry highly regulated, and you would need both mechanical and electrical experience, the site has a steam system, both plant steam and pur steam, as well as purified water systems. This role is 6-8 months and salary quoted is pro rata, there would also be a completion bonus of 10% when the role is finished. You would be responsible for providing ‘hands on’ engineering support to both the Facilities and Manufacturing functions whilst adhering to the site EHS and Pharmaceutical Quality procedures. Principal Responsibilities Routine preventative maintenance requirements for production and facility. Routine instrumentation across the facility. Supporting where required specialised contractors carrying out routine and re-active maintenance tasks. Troubleshooting faults and failures in processing equipment...

C&I Lead / Principal Engineer Location: Glasgow – 3 days per week in office / 2 days from home Rate: £55–£60 per hour (PAYE) + Holiday Pay Hours: 40 hours per week Contract Duration: 12 Months + Sector: Onshore Oil & Gas (Gas Transmission) Overview We are currently recruiting for a C&I Lead / Principal Engineer to support a major project within the onshore oil & gas / gas transmission sector. This position will act as the functional Lead Engineer, responsible for delivering the Control & Instrumentation scope across both FEED and Detailed Design phases. You will lead a team of engineers and designers across the UK and globally, ensuring high-quality, compliant, and timely delivery of all C&I engineering activities. Key Responsibilities Act as the C&I Lead Engineer on a major onshore oil & gas project Lead and coordinate UK and global engineering teams to deliver project scope Manage delivery of C&I engineering activities across FEED...

Principal Pipeline Engineer - Low Carbon Location: Remote with occasional visits to office for Project Meetings Team: Energy Transition Shape the future of low‑carbon infrastructure. We're driven by a simple belief: the world we design today should create a cleaner, greener and safer tomorrow. We push boundaries, embrace innovation and collaborate across a global network of experts to deliver solutions that stand the test of time. Join us, and you'll be part of a team that takes pride in its people, its purpose and its impact. About the Role We're looking for a Principal Pipeline Engineer to join a growing Energy Transition Team. This is an exciting opportunity to lead the development of mechanical and pipeline designs across a wide range of transmission projects, including: * Natural gas (below and above 7 bar) * Hydrogen transmission * Carbon dioxide pipelines * Wider low‑carbon and energy transition infrastructure You'll work as part of a large multidisciplinary...

Job Title: C&I Lead Principal Engineer Location: Glasgow  Overview: C&I Lead Principal Engineer based in Glasgow on a 12 month contract duration. Responsibilities: •    Work activities will include project work as the functional Lead Engineer on a Project for Gas transmission industry. •    Lead a team of Engineers and Designers both based in the UK and globally to deliver the C&I scope of work on the project. •    Work activities will be executed across FEED and Detailed Design phases of projects. •    Project work will include the development of Control & Instrument Engineering deliverables. Qualifications: Skills / Qualifications: •    Experience in Control & Instrument Engineering Design on Medium / Large capital projects from concept to start-up. •    Extensive experience in Gas industry. •    Previous experience on NGT projects preferable and/or G35 approver experience is preferred. •    Competent in working within the C&I Discipline of a...

Role: Principal Safety Engineer Location: Plymouth(Hybrid) Duration: 12 months Inside IR35: Umbrella About our client: Our client in Devonport is a leading engineering and maritime organisation specialising in the maintenance, repair, and overhaul of naval vessels. The site operates with a skilled workforce across mechanical, electrical, and technical disciplines, delivering high-quality and complex engineering projects. It offers a structured and collaborative working environment with opportunities for hands-on experience and professional development. Main Purpose of Role Responsible for ensuring the delivery of the safety engineering aspects of the facility. Ensure systems are designed against a clear statement of compliance with defined requirements, including demonstration that the design meets relevant HSE requirements. Guiding the development of engineering to the required scope and quality to support timely delivery of the project. Review of Safety Engineering...

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...

Principal Operational Highway Engineer Overview: Our client in the North East is seeking an experienced Principal Highways Engineer to lead the operational delivery of highways maintenance and civil engineering services. This position plays a key role in managing day-to-day operational activity, ensuring highway networks are safely maintained, efficiently managed, and delivered to industry best practice. You will oversee maintenance programmes, manage budgets, coordinate inspections, support service improvements, and act as a senior point of contact across technical operations. The role involves close collaboration with internal teams, external partners, and other stakeholders to ensure a consistent, high-quality approach to service delivery. Key Responsibilities: ·Lead the operational delivery of highways and civil engineering maintenance activities. ·Develop, manage, and implement planned and reactive maintenance programmes. ·Oversee budget management across operational...

We are looking for an Electrical Site Manager to oversee an electrical package for a major tunnel upgrade project, including the design, supply, installation, integration, testing, commissioning, and handover of the Tunnel Control System (TCS) and associated tunnel systems. We are seeking an experienced Electrical Site Manager to lead the on-site delivery of all electrical works within a live highways tunnel environment. This role is critical to ensuring safe, compliant, and high-quality installation and integration of complex tunnel systems. Key Responsibilities Site Management & Delivery Manage day-to-day electrical site operations across tunnel works Lead installation of electrical systems including: Tunnel lighting systems LV distribution and containment Emergency systems (UPS, fire alarm interfaces, etc.) SCADA / Tunnel Control System (TCS) infrastructure Ensure works are delivered in line with programme, budget, and quality requirements Coordinate subcontractors,...

Senior / Principal Electronics Engineer (Contract) Power Electronics | Aerospace | Technical Leadership | Cardiff If you’re the person others turn to for power electronics expertise — this is where you take full ownership. This Senior / Principal Electronics Engineer role is about leading the design and development of aerospace power conversion systems that must perform in demanding, safety-critical environments. You’ll be trusted as the technical authority — shaping architecture, making key design decisions, and ensuring systems meet both performance and regulatory expectations. If you enjoy solving complex power challenges and want to influence how systems are designed from the ground up, this role gives you that scope. What You’ll Be Responsible For as a Senior / Principal Electronics Engineer You’ll take ownership of AC/DC and DC/DC converter design across the full development lifecycle. Your work will include: * Leading detailed design and development of aerospace power...

Principal Structural Engineer Location: Manchester (Hybrid working, 3 to 4 days a week onsite) Contract: 12 month contract Rate: £400 to £490 per day (outside IR35) We are currently recruiting for a Principal Structural Engineer to join a growing engineering consultancy delivering major infrastructure projects across the rail and water sectors. This is an excellent opportunity to work on technically challenging projects while leading structural design delivery within an experienced multidisciplinary team. The Role As a Principal Structural Engineer, you will be responsible for providing technical leadership and ensuring high-quality structural design delivery across a range of infrastructure projects. You will work closely with clients, project teams, and junior engineers to develop safe, efficient, and compliant structural solutions. Key responsibilities include: Ensuring the design team produces deliverables that meet safety and quality requirements Approving design...

I'm recruiting for a HV Design Engineer to work on a long contract outside of IR35 to work with a leading international engineering and consulting group. They work in close partnership with clients to solve complex challenges around the movement of people, goods, and services-delivering innovative, resilient infrastructure solutions. With a strong focus on future-ready design, they are at the forefront of developing smarter, more efficient infrastructure that responds to evolving technologies, changing behaviours, and increasing demand. Their approach puts people at the heart of design, combining technical excellence with a collaborative, forward-thinking culture. With ambitious growth plans in the UK, this is an excellent time to join the business as they continue to expand their footprint and reputation across the energy and infrastructure sectors. Hybrid working based out of offices in either London, Birmingham, York, Manchester, Edinburgh or Reading. They are seeking a...

We are seeking an experienced Principal Electrical (EC&I) Commissioning Engineer to support a major defence project at a secure, highly regulated site near Reading. This is a senior, site-based role requiring a high level of technical expertise, leadership, and experience in commissioning, testing, and assurance of electrical and control systems within safety-critical environments. Role: Principal Electrical (EC&I) Commissioning Engineer Location: Reading (site-based) Rate: £70 per hour Inside IR35 (Based on year's experience) Employment Type: Contract 12 Months Key Responsibilities ·Lead and oversee the commissioning, testing, and validation of electrical and EC&I systems on a complex defence project and provide technical leadership and mentorship to junior commissioning engineers and site teams. ·Develop, review, and approve commissioning strategies, test procedures, and method statements, alongside supervising functional testing, fault finding, and troubleshooting...

Are you a Principal Engineer with proven experience managing a team on rail-based projects?   Have you got experience with earthing and bonding and DNO's?   Position: Principal E&P Engineer Rate: DOE (Outside Ir35) Location: York, Sheffield or Preston  (Hybrid 2 days WFH)   This is an opportunity to work on various rail infrastructure projects based in the North, including signalling power, E&P works and earthing and bonding.   As Principal Engineer you will be responsible for working on projects including low voltage systems, signalling power, and station electrification, as well as earthing and bonding.   As Principal Engineer you must have proven experience working in a senior position with line manager responsibilities/experience managing a team. If you are a proven CRE this is highly desirable.   Requirements: ·Proven experience as a Senior E&P Design Engineer, managing teams. ·Strong technical knowledge in low voltage systems, station design, and...

Job Opportunity: Principal CE&I Engineer Location: Manchester Contract Type: 12 month/full time 🔧 About the Role We are seeking an experienced Principal CE&I Engineer to lead, manage and deliver high‑quality CE&I design solutions for a major nuclear processing, storage and decommissioning facility. This is a senior technical role requiring strong leadership, deep engineering expertise and the ability to work collaboratively with clients, Responsible Engineers and multidisciplinary teams. You will play a pivotal role in shaping design strategy, ensuring compliance with Sellafield, British and European Standards, and guiding projects from early concept through to detailed design and tender documentation. 🧩 Key Responsibilities Lead the management, review and delivery of CE&I design deliverables for complex nuclear projects. Interpret and implement Sellafield, British and European Standards to produce bespoke tender documentation and associated design outputs....

My client is seeking a reliable and skilled day & night Electrical Shift Engineer to join their team in the London area on a temporary 3-month contract. The successful candidate will be responsible for carrying out planned preventative maintenance (PPM) and reactive works across the site, ensuring operational assets experience minimal downtime. Working within a team of engineers, you will maintain high standards of competency and safety, delivering exceptional service to the client and contributing to overall customer satisfaction. You will provide technical support, advice, and guidance to both the client and team members, demonstrating best value when progressing repairs and minor works. Ownership of the site service is essential, ensuring all works are completed safely, accurately, and within agreed service level agreements (SLAs). Principal Accountabilities Work collaboratively within a team of engineers to uphold the highest standards and competencies. Deliver...