75 senior principal mechanical design engineer jobs found in Cardiff

 Senior/Principal Mechanical Design Engineer – South Wales (Building Services) Location: South Wales  Salary: Competitive, depending on experience + package Job Type: Full-time, permanent I’m working with a well-established and highly respected Building Services Contractor based in South Wales who are currently looking to strengthen their in-house mechanical design team with the addition of a Senior or Principal Mechanical Design Engineer . With a strong pipeline of secured work across a range of sectors – including commercial, education, healthcare, residential, hospitality, and retail – this is an exciting opportunity for someone who wants to step into a role with real responsibility and the backing of an experienced, supportive team. 🏗️ About the Role This is a lead design role within the business. You’ll be responsible for managing mechanical design from early-stage concept through to technical delivery on site. You’ll act as the main point of contact for...

 Senior/Principal Mechanical Design Engineer – South Wales (Building Services) Location: South Wales  Salary: Competitive, depending on experience + package Job Type: Full-time, permanent I’m working with a well-established and highly respected Building Services Contractor based in South Wales who are currently looking to strengthen their in-house mechanical design team with the addition of a Senior or Principal Mechanical Design Engineer . With a strong pipeline of secured work across a range of sectors – including commercial, education, healthcare, residential, hospitality, and retail – this is an exciting opportunity for someone who wants to step into a role with real responsibility and the backing of an experienced, supportive team. 🏗️ About the Role This is a lead design role within the business. You’ll be responsible for managing mechanical design from early-stage concept through to technical delivery on site. You’ll act as the main point of contact for...

 Senior/Principal Mechanical Design Engineer – South Wales (Building Services) Location: South Wales  Salary: Competitive, depending on experience + package Job Type: Full-time, permanent I’m working with a well-established and highly respected Building Services Contractor based in South Wales who are currently looking to strengthen their in-house mechanical design team with the addition of a Senior or Principal Mechanical Design Engineer . With a strong pipeline of secured work across a range of sectors – including commercial, education, healthcare, residential, hospitality, and retail – this is an exciting opportunity for someone who wants to step into a role with real responsibility and the backing of an experienced, supportive team. 🏗️ About the Role This is a lead design role within the business. You’ll be responsible for managing mechanical design from early-stage concept through to technical delivery on site. You’ll act as the main point of contact for...

Senior / Principal Mechanical Engineer Location: Bristol Discipline: Mechanical Building Services An exciting opportunity has arisen for an experienced Mechanical Engineer to join a growing multi-disciplinary building services team. You’ll be part of a dynamic and innovative group delivering projects from early-stage strategy and concept design through to detailed design, construction and post-completion evaluation. This role is ideal for a Senior Engineer ready to step up, or an established Principal Engineer seeking more autonomy, leadership and influence in project delivery and team development. What You’ll Be Doing Lead the design and delivery of mechanical building services systems, including calculations, schematics, specifications, models, equipment schedules and technical documentation. Oversee projects from concept to completion, ensuring technical excellence, innovation and compliance with relevant regulations and standards. Attend and lead design team...

Senior / Principal Mechanical Engineer Location: Bristol Discipline: Mechanical Building Services An exciting opportunity has arisen for an experienced Mechanical Engineer to join a growing multi-disciplinary building services team. You’ll be part of a dynamic and innovative group delivering projects from early-stage strategy and concept design through to detailed design, construction and post-completion evaluation. This role is ideal for a Senior Engineer ready to step up, or an established Principal Engineer seeking more autonomy, leadership and influence in project delivery and team development. What You’ll Be Doing Lead the design and delivery of mechanical building services systems, including calculations, schematics, specifications, models, equipment schedules and technical documentation. Oversee projects from concept to completion, ensuring technical excellence, innovation and compliance with relevant regulations and standards. Attend and lead design team...

Senior / Principal Mechanical Engineer Location: Bristol Discipline: Mechanical Building Services An exciting opportunity has arisen for an experienced Mechanical Engineer to join a growing multi-disciplinary building services team. You’ll be part of a dynamic and innovative group delivering projects from early-stage strategy and concept design through to detailed design, construction and post-completion evaluation. This role is ideal for a Senior Engineer ready to step up, or an established Principal Engineer seeking more autonomy, leadership and influence in project delivery and team development. What You’ll Be Doing Lead the design and delivery of mechanical building services systems, including calculations, schematics, specifications, models, equipment schedules and technical documentation. Oversee projects from concept to completion, ensuring technical excellence, innovation and compliance with relevant regulations and standards. Attend and lead design team...

Senior to Principal Mechanical Design Engineer Location: Oxford | Sectors: Low Carbon, Heritage, Education, Healthcare About the Company Join a well-established, independent building services consultancy in Oxford, known for delivering sustainable, technically robust solutions across heritage refurbishments, modern low-energy campuses, and complex infrastructure projects. Our integrated team combines mechanical, electrical, lighting, Passivhaus, and building physics expertise under one roof. With a strong pipeline of work and investment in people, this role offers long-term progression and a chance to shape meaningful projects. The Role As a Senior or Principal Mechanical Engineer, you will: Lead mechanical design from RIBA Stage 2 to handover: HVAC, hot/cold water, and sustainable strategies. Collaborate with clients, architects, and internal teams to create energy-efficient, technically sound solutions. Apply building physics and performance analysis where...

Senior to Principal Mechanical Design Engineer Location: Oxford | Sectors: Low Carbon, Heritage, Education, Healthcare About the Company Join a well-established, independent building services consultancy in Oxford, known for delivering sustainable, technically robust solutions across heritage refurbishments, modern low-energy campuses, and complex infrastructure projects. Our integrated team combines mechanical, electrical, lighting, Passivhaus, and building physics expertise under one roof. With a strong pipeline of work and investment in people, this role offers long-term progression and a chance to shape meaningful projects. The Role As a Senior or Principal Mechanical Engineer, you will: Lead mechanical design from RIBA Stage 2 to handover: HVAC, hot/cold water, and sustainable strategies. Collaborate with clients, architects, and internal teams to create energy-efficient, technically sound solutions. Apply building physics and performance analysis where...

Senior to Principal Mechanical Design Engineer Location: Oxford | Sectors: Low Carbon, Heritage, Education, Healthcare About the Company Join a well-established, independent building services consultancy in Oxford, known for delivering sustainable, technically robust solutions across heritage refurbishments, modern low-energy campuses, and complex infrastructure projects. Our integrated team combines mechanical, electrical, lighting, Passivhaus, and building physics expertise under one roof. With a strong pipeline of work and investment in people, this role offers long-term progression and a chance to shape meaningful projects. The Role As a Senior or Principal Mechanical Engineer, you will: Lead mechanical design from RIBA Stage 2 to handover: HVAC, hot/cold water, and sustainable strategies. Collaborate with clients, architects, and internal teams to create energy-efficient, technically sound solutions. Apply building physics and performance analysis where...

Senior to Principal Mechanical Design Engineer – Building Services 📍 Southampton (Hybrid Working) 💼 Full-Time 💰 Highly Competitive Salary + Bonus + Benefits About the Role A leading independent building services consultancy on the South Coast is seeking a Senior to Principal Mechanical Design Engineer to join their growing team in Southampton. Known for their technical strength, sustainable approach, and long-term client relationships, this firm delivers a broad range of projects across the healthcare, education, research, commercial, and industrial sectors. This role is ideal for an experienced engineer ready to lead projects, manage teams, and play an integral part in delivering innovative and low-carbon mechanical building services solutions. What You’ll Be Doing Lead mechanical design on a range of complex projects, from early-stage feasibility to technical delivery and handover Take ownership of project outputs including reports, calculations, technical...

Senior to Principal Mechanical Design Engineer – Building Services 📍 Southampton (Hybrid Working) 💼 Full-Time 💰 Highly Competitive Salary + Bonus + Benefits About the Role A leading independent building services consultancy on the South Coast is seeking a Senior to Principal Mechanical Design Engineer to join their growing team in Southampton. Known for their technical strength, sustainable approach, and long-term client relationships, this firm delivers a broad range of projects across the healthcare, education, research, commercial, and industrial sectors. This role is ideal for an experienced engineer ready to lead projects, manage teams, and play an integral part in delivering innovative and low-carbon mechanical building services solutions. What You’ll Be Doing Lead mechanical design on a range of complex projects, from early-stage feasibility to technical delivery and handover Take ownership of project outputs including reports, calculations, technical...

Senior to Principal Mechanical Design Engineer – Building Services 📍 Southampton (Hybrid Working) 💼 Full-Time 💰 Highly Competitive Salary + Bonus + Benefits About the Role A leading independent building services consultancy on the South Coast is seeking a Senior to Principal Mechanical Design Engineer to join their growing team in Southampton. Known for their technical strength, sustainable approach, and long-term client relationships, this firm delivers a broad range of projects across the healthcare, education, research, commercial, and industrial sectors. This role is ideal for an experienced engineer ready to lead projects, manage teams, and play an integral part in delivering innovative and low-carbon mechanical building services solutions. What You’ll Be Doing Lead mechanical design on a range of complex projects, from early-stage feasibility to technical delivery and handover Take ownership of project outputs including reports, calculations, technical...

Job Description Are you a Mechanical Design Engineer who thrives on leading the way on solving difficult engineering problems? Are you drawn to complex projects and excited by the opportunity to rapidly progress your technical leadership skills to the next level, heading up multi-disciplinary projects? If so, you might enjoy solving the energy industry’s most important mechanical engineering conundrums for a multitude of energy systems across a variety of clients. You could be Managing exciting projects designing test rigs in support of the development of the UKs nuclear fusion capabilities, carrying out structural integrity assessment of primary plant (for both civil and defence applications) to keep existing fleet generating, designing high integrity structures for new nuclear establishments, or leading one of many renewable energy projects across a growing carbon net zero portfolio. You’re likely to be juggling several projects simultaneously, so enjoying...

Note for Recruitment Agencies: We prefer to hire directly and we will be in touch with our PSL Agencies if this role is eligible for release. We do not accept speculative CVs from agencies. If speculative CVs are sent, no fee will be applicable – please direct all queries to the relevant Resourcing Partner. Mechanical Senior Design Engineer - (Water Sector) Can be based anywhere in the UK What you will be doing: As Senior Design Engineer you will be an important member of the Engineering Design Team and will be required to work with the Principal Engineer(s), Design Team, Design Manager(s) and Design Leads to deliver design to the highest quality to GT process and in compliance with the BMS and H&S Regulations. This is a technical role, engaged directly on projects, which requires competency in technical design delivery in the water and wastewater industry. The Senior Design Engineer can have line management responsibility for design engineers and others as...

Note for Recruitment Agencies: We prefer to hire directly and we will be in touch with our PSL Agencies if this role is eligible for release. We do not accept speculative CVs from agencies. If speculative CVs are sent, no fee will be applicable – please direct all queries to the relevant Resourcing Partner. Electrical Senior Design Engineer What you will be doing: As Electrical Senior Design Engineer you will be responsible for all activities associated with the production of Electrical Design in compliance with the Business Management Systems (BMS) and CDM regulations, assisting with the wider general Process, Mechanical, Electrical, Instrumentation, Control and Automation (PMEICA) and Civils design production activities, providing technical support to the supply chain procurement activities and supporting site activities as required. You will also assist with the management of Consultants and Sub-contractors design production.  About You: Have the necessary...

Job Description Start here. Grow here. We are seeking a Principal Cable System Design Engineer to join our expanding Transmission & Distribution (T&D) team within AECOM. This is a senior role within the business, with responsibility for driving technical excellence, leading complex projects, and supporting strategic client engagement across a broad portfolio of high-voltage infrastructure schemes. As a Principal Engineer, you will play a critical role in the planning, design, and delivery of cable systems across multiple voltage levels. Our clients include Transmission System Operators, Distribution Network Operators, private developers , and international energy majors across the UK and globally. You will act as a trusted advisor to clients, and contribute to developing our technical standards, innovation strategy, and digital delivery approach within the cable engineering space. This is a fantastic opportunity to be at the forefront of energy transition,...

Overview Stirling Dynamics is recruiting Principal and Senior Electronics Hardware Design Engineer to join the Software & Electronic Hardware team. Due to recent contract wins and supporting continued growth, Stirling Dynamics are looking for a talented and experienced electronics design engineer to join our team to work with us delivering complex electronic based solution for electro-mechanical products, projects, and services to the world's leading Aerospace & Defence companies. This role is to fill a position in the dynamic multi discipline team developing electro-mechanical based systems for Electric Vertical Take Off and Landing Aircraft (EVTOL). This role will be based in our Bristol office with occasional travel to our clients’ sites as required however as part of our commitment to flexible working, employees are able to work a hybrid working model. Responsibilities The successful candidate will be responsible for producing...

Role purpose Are you a seasoned Mechanical Design Engineer with a strong background in the water and wastewater sector? Due to continued success building on our existing framework agreements and a confident growth plan in AMP 8 and AMP 9, across all 10 major water and wastewater companies in England and Wales, we’re seeking a confident, innovative professional to lead the design and delivery of complex infrastructure projects. Join our dynamic and growing team as a Senior Mechanical Design Engineer with a passion for engineering sustainable assets which our valued customers are proud to own and operate. Role is available in our Midsomer Norton Office (Head Office), or Newport office. In this role, you’ll have the opportunity to work on a diverse range of challenging projects, from innovative treatment systems to infrastructure upgrades, all while collaborating with a supportive, forward-thinking team of 40+ engineers.  Your expertise will shape sustainable engineering...

Job Description We have an exciting opportunity for a Senior Mechanical Design Engineer to join our Power Unit Integration (PUI) group, contributing to the design and development of assemblies that connect and package the power unit within the F1 car.  Collaborating with the Group Principal and Head of Powertrain, you will take ownership of various subassemblies within the PUI group, delivering high-quality designs that balance performance, manufacturability, and serviceability. Your work will focus on composite and mechanical components , including radiator ducts, surfaces, enclosures, and tooling for large composite assemblies, ensuring seamless integration with surrounding systems .  About You You’re an experienced mechanical designer with a solid grasp of engineering fundamentals and a proven track record of working with composite components . You have hands-on experience c reating composite ducts, fairings, or bodywork assemblies ,   ideally gained in motorsport,...

Job Description We are currently recruiting a Principal Design Engineer to lead the Transmission team within our Powertrain group. Collaborating with the Head of Powertrain and the PUI team, you will be responsible for managing a subgroup of Designers and Senior Designers within the department, covering a wide variety of assemblies throughout the F1 car. You’ll play a key role in the overall design, development, and performance optimisation of our transmission systems , delivering robust, lightweight, high-performance solutions that operate flawlessly under extreme loads and dynamic conditions. In addition, you'll be responsible for the day-to-day  management of a team  of multidisciplinary engineers. We are looking for a team leader who can  drive technical excellence  while  fostering a collaborative, high-performance culture  in the team. The ideal candidate will be capable of guiding a multidisciplinary group,  setting clear priorities, and ensuring alignment across the...