Mechanical Engineering is excited to offer multiple opportunities for experienced Principal Mechanical Design Engineers, with roles available across all areas of the Product Life Cycle, from mechanical future concepts and detailed design through qualification, production, and in-service support. In these roles of responsibility, you will lead the development of mechanical solutions for a wide variety of complex weapons and weapon systems, working closely with multi-disciplinary teams across engineering, manufacturing, quality, and supply chain. You will be expected to provide technical leadership, drive design maturity, and act as a key interface with internal and external stakeholders. Salary: Circa £50,000+ depending on experience Location: Stevenage (relocation package may be available) Dynamic (Hybrid) Working: An average of 2-3 days per week on-site dependent on work classification Security Clearance: British Citizen or a Dual UK national with British citizenship....

Role: Project Manager (Civils) Position: Contract Location: Leiston / hybrid Days on Site: 3 days Duration: Approx until 31st Dec 2026 Pay: up to 484 PAYE - 700 Umbrella The Civil Works Programme comprises a series of projects that will be delivered over a 10-year period. Each element of the scope has been assigned to a combination of participants that will be responsible and accountable for the delivery. The Civils Programme will deliver the Sizewell C Civil Engineering scope to support the MEH erection in the Nuclear, Conventional and Heat Sink islands. The Civil Works Programme is responsible for delivering: Enabling and Earthworks: sea defences, access facilities, civil engineering work to support site establishment, diaphragm walling around the nuclear plant footprint, dewatering, excavation and earthworks. Tunnelling and Marine: beach landing facility, jetty, shafts and intake and outfall tunnels for the nuclear plant cooling systems. Main civil...

Principal Mechanical Engineer - Water Sector Bristol, Exeter or Cardiff Hybrid 2-3 days per week 60-70k + excellent benefits Advance TRS are partnering with a global engineering consultancy who are looking for a Principal Mechanical Engineer. With AMP8 driving major change, this is your opportunity to lead meaningful projects that tackle climate and environmental challenges head-on. What you'll do: Lead mechanical design across the full project lifecycle-from concept to construction Deliver innovative solutions for water & wastewater treatment, pumping stations, and infrastructure Collaborate with multidisciplinary teams, clients, and contractors Mentor and support the next generation of engineers What you'll bring: Degree in Mechanical Engineering (or similar), ideally Chartered or working toward it Strong experience in detailed design within the water sector A collaborative mindset and passion for sustainable engineering Why join...

Head of Design at a Growing Design & Build M&E Contractor Seeking Principal / Associate Mechanical Design Engineer Up to 80k 5% Bonus + Commission Travel Paid Hybrid Working City of London We're working with a fast-growing Design & Build contractor delivering high-quality M&E solutions across commercial office fit-out projects. Established just 5 years ago, the business is already turning over 7-8m and building a strong reputation in the CAT A & CAT B space. They're now looking for a Principal or Associate Mechanical Design Engineer to take ownership of mechanical design and play a pivotal role in shaping their in-house M&E design capability. The Opportunity This is more than just a senior engineer role - it's a chance to build and lead a design function within a growing contractor. You'll be the go-to technical authority, working closely with project teams and clients to deliver practical, buildable solutions. You'll: Lead the...

Job Title: Senior Mechanical Engineer (Building Services) Location: Cardiff / Swansea Pay Rate: 51 per hour Umbrella PAYE (37.5 hours per week) Qualifications required: Degree / IEng / CEng Travelling costs expensed Notice Period: 4 weeks 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 management. Mechanical...

Job Title: Principal Thermal Mechanical Engineer Location: Cowes, Portsmouth Broad Oak, Great Baddow, 3 days a week onsite We offer a range of flexible working arrangements - please speak to your recruiter about the options for this particular role Salary: Up to £77,100 (dependent on skills and experience) Part time & accruing hours available' Please let us know if you would like to discuss these options. Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. From the depths of the ocean, to the far reaches of space, there's no limit to where a career at BAE Systems could take you. Role description: The Principal...

Job Title: Principal Thermal Mechanical Engineer Location: Cowes, Portsmouth Broad Oak, Great Baddow, 3 days a week onsite We offer a range of flexible working arrangements - please speak to your recruiter about the options for this particular role Salary: Up to £77,100 (dependent on skills and experience) Part time & accruing hours available' Please let us know if you would like to discuss these options. Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. From the depths of the ocean, to the far reaches of space, there's no limit to where a career at BAE Systems could take you. Role description: The Principal...

Job Title: Principal Thermal Mechanical Engineer Location: Cowes, Portsmouth Broad Oak, Great Baddow, 3 days a week onsite We offer a range of flexible working arrangements - please speak to your recruiter about the options for this particular role Salary: Up to £77,100 (dependent on skills and experience) Part time & accruing hours available' Please let us know if you would like to discuss these options. Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. From the depths of the ocean, to the far reaches of space, there's no limit to where a career at BAE Systems could take you. Role description: The Principal...

Job Title: Principal Thermal Mechanical Engineer Location: Cowes, Portsmouth Broad Oak, Great Baddow, 3 days a week onsite We offer a range of flexible working arrangements - please speak to your recruiter about the options for this particular role Salary: Up to £77,100 (dependent on skills and experience) Part time & accruing hours available' Please let us know if you would like to discuss these options. Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. From the depths of the ocean, to the far reaches of space, there's no limit to where a career at BAE Systems could take you. Role description: The Principal...

Job Title: Principal Thermal Mechanical Engineer Location: Cowes, Portsmouth Broad Oak, Great Baddow, 3 days a week onsite We offer a range of flexible working arrangements - please speak to your recruiter about the options for this particular role Salary: Up to £77,100 (dependent on skills and experience) Part time & accruing hours available' Please let us know if you would like to discuss these options. Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. From the depths of the ocean, to the far reaches of space, there's no limit to where a career at BAE Systems could take you. Role description: The Principal...

Job Title: Principal Thermal Mechanical Engineer Location: Cowes, Portsmouth Broad Oak, Great Baddow, 3 days a week onsite We offer a range of flexible working arrangements - please speak to your recruiter about the options for this particular role Salary: Up to £77,100 (dependent on skills and experience) Part time & accruing hours available' Please let us know if you would like to discuss these options. Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. From the depths of the ocean, to the far reaches of space, there's no limit to where a career at BAE Systems could take you. Role description: The Principal...

Job Title: Principal Thermal Mechanical Engineer Location: Cowes, Portsmouth Broad Oak, Great Baddow, 3 days a week onsite We offer a range of flexible working arrangements - please speak to your recruiter about the options for this particular role Salary: Up to £77,100 (dependent on skills and experience) Part time & accruing hours available' Please let us know if you would like to discuss these options. Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. From the depths of the ocean, to the far reaches of space, there's no limit to where a career at BAE Systems could take you. Role description: The Principal...

Job Title: Principal Thermal Mechanical Engineer Location: Cowes, Portsmouth Broad Oak, Great Baddow, 3 days a week onsite We offer a range of flexible working arrangements - please speak to your recruiter about the options for this particular role Salary: Up to £77,100 (dependent on skills and experience) Part time & accruing hours available' Please let us know if you would like to discuss these options. Who we are: Join BAE Systems and you'll be part of something bigger. As a valued member of our global colleague network, you'll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You'll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. From the depths of the ocean, to the far reaches of space, there's no limit to where a career at BAE Systems could take you. Role description: The Principal...

Principal Electrical Design Engineer Power Networks, Transmission & Distribution Birmingham B23 3AY or B3 3BY, London W1T 4BJ or SE1 7QJ or Glasgow G2 1RW or G1 3DX Permanent 80,000 to 99,000 plus company pension plus Performance-linked annual bonus. Flexible company pension. Commitment to ongoing training and professional development. Private health insurance (subject to underwriting). Relevant life insurance (subject to underwriting). EV car scheme. Employee discount programme. Ride to Work scheme. Gym allowance. Season ticket loan. Mobile phone allowance You will have: Degree in Electrical Engineering or related discipline Extensive experience in substation layouts and Extra High Voltage systems. HV Primary Plant Design for AIS or GIS substations at 132kV, 275kV or 400kV You will be performing: Single Line Diagrams Layouts, Earthing Short-Circuit (SC) Force Calculations and Mechanical Integrity Calculations You will have:...

Position: Principal Mechanical Engineer Location: Warrington or Abingdon (flexible with location) Start Date: ASAP Hours: 37 hours per week, Monday - Friday Hybrid: 3 days in the office and 2 days home working Mechanical Engineer - Nuclear Projects The Mechanical Engineer will work within multi-disciplinary engineering teams delivering projects across different lifecycle stages, from FEED through to detailed design, commissioning, and operational support within regulated nuclear environments. You will be involved in mechanical design and technical studies, supporting a range of systems including handling equipment, mechanical transfer systems, and process equipment used in high-active or controlled environments. Work will also include design development, technical documentation, and support across construction, commissioning, operations, and decommissioning phases. Key Responsibilities Deliver and manage mechanical engineering studies and design work Produce and...

Principal Electrical Design Engineer Power Networks, Transmission & Distribution Birmingham B23 3AY or B3 3BY, London W1T 4BJ or SE1 7QJ or Glasgow G2 1RW or G1 3DX Permanent 80,000 to 99,000 plus company pension plus Performance-linked annual bonus. Flexible company pension. Commitment to ongoing training and professional development. Private health insurance (subject to underwriting). Relevant life insurance (subject to underwriting). EV car scheme. Employee discount programme. Ride to Work scheme. Gym allowance. Season ticket loan. Mobile phone allowance You will have: Degree in Electrical Engineering or related discipline Extensive experience in substation layouts and Extra High Voltage systems. HV Primary Plant Design for AIS or GIS substations at 132kV, 275kV or 400kV You will be performing: Single Line Diagrams Layouts, Earthing Short-Circuit (SC) Force Calculations and Mechanical Integrity Calculations You will have:...

Location: Templecombe, United Kingdom Thales people provide armed forces customers with operational advantage at every decisive moment throughout the mission. Defence and armed forces customers rely on us to deliver the full range of defence mission systems solutions at land, sea, and air. Our platforms extend across the battlespace including Above and Sonar, Electronic Combat, and Intelligence, Surveillance and Reconnaissance systems. Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of people each day to make life better, and keep us safer. We innovate across the major industries of Aerospace, Defence, Security and Space. Your health and well-being matters to us and that’s why we offer you the flexibility to do what’s important to you; whether that’s part time hours, job sharing, home working, or the ability to...

Principal Pipeline Engineer Location: Remote with occasional visits to office for Project Meetings Position is with a global multi disciplined Engineering solutions provider 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...

Principal Mechanical Engineer - Low Carbon Location: Remote with occasional visits to the office 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)...

Associate Director - Electrical Engineering Location: Bolton Salary: Up to 75,000 Job Ref: 39636 A rare opportunity has arisen for an experienced Electrical Engineer ready to step into an Associate Director role within a well-established Building Services Consultancy. This position offers the chance to work in a client-focused environment with a long-standing, secure pipeline of projects across a diverse range of sectors. Based in Bolton, you will also attend design team meetings and site visits across Manchester, the wider North West and occasionally throughout the UK. The business operates across multiple offices and has built a strong reputation for delivering innovative, practical, and technically robust engineering solutions. This role will see you leading electrical design delivery from feasibility through to RIBA Stage 5, working on a wide variety of projects including commercial developments, pharmaceutical facilities, residential schemes, leisure projects,...