15 principal mechanical engineer jobs found

Delivering safe, reliable, and high-integrity solutions for complex nuclear and mechanical systems across regulated environments. The Principal Mechanical Engineer leads the delivery of engineering and technical activities, applying mechanical engineering principles, domain knowledge, and experience. They resolve complex technical issues, ensure compliance with specifications, and support stakeholder requirements while mentoring others and working independently or within small teams. Key Responsibilities • Lead and manage multi-disciplinary teams delivering mechanical engineering work within scope, time, and quality requirements. • Provide technical oversight and approval of engineering outputs (calculations, analyses, reports, specifications, and method statements). • Ensure compliance with relevant codes, standards, and health, safety, and environmental requirements. • Act as a subject matter expert in mechanical systems, solving complex technical problems and supporting...

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...

Job Specification: Electrical Design Engineer (Senior - Lead) Business Unit: Data Centre Design Consultancy (Client Side) Location: Remote Reporting to: Associate Director/Director Overview We are seeking highly skilled Senior and Lead Electrical Design Engineers to join our specialist data centre design consultancy team. These roles will be responsible for driving the design, coordination, and delivery of complex electrical systems for hyperscale, colocation, and enterprise data centre environments. You will work directly with clients, end users, and multidisciplinary engineering teams to develop high‑quality, technically robust designs from concept through to construction. Core Responsibilities (All Levels) Lead and produce electrical designs for data centre infrastructure including: HV and LV power distribution UPS systems (static and rotary) Standby generation Earthing and bonding Lighting and small power Busbar distribution systems Develop design documentation:...

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...

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...

Our client, a leading entity within the Defence & Security sector, is looking for a Senior/Principal Hardware Engineer to join their team for a contract position based in Rochester. This is a unique opportunity to work on cutting-edge projects involving Helmet Mounted & Head-Up Displays, Mission Computers, Flight Controls, and other associated safety-critical technology. Key Responsibilities: Executing complex hardware design tasks in accordance with the hardware development plan, whilst meeting agreed timescales and allocated budgets Conducting hardware requirements capture, preliminary design, detailed design including a range of analysis tasks Adopting an innovative approach to design and identifying improvements to working practices Working with other disciplines within an integrated team to optimise solutions and minimise impacts from dependencies Providing technical guidance and support to the development and delivery of all aspects of digital &/or analogue...

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...

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...