https://jobs.co.uk/jobs-results?Keyword=Principal%20Mechanical%20Design%20Engineer&RadiusMiles=10 RSS feed for Principal Mechanical Design Engineer Jobs. en-gb Fri, 24 Apr 2026 09:24:08 GMT https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--dfea9bf8-8ae3-49ba-8a23-7ba10cf4750b https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--dfea9bf8-8ae3-49ba-8a23-7ba10cf4750b Thu, 23 Apr 2026 11:53:26 GMT Location: Barrow-in-furness | Salary: 10000-500000 Annual | Type: Permanent | Job Title: Principal Mechanical Design Engineer Location: Barrow-In-Furness, hybrid We offer a range of hybrid and flexible working arrangements please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on experience Who we are: Join BAE Systems and youll be part of something bigger click apply for full job details Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--9e43bb9a-ea8d-4f7a-a141-15da0632a46f https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--9e43bb9a-ea8d-4f7a-a141-15da0632a46f Wed, 22 Apr 2026 11:52:46 GMT Location: Barrow-in-furness | Salary: 10000-500000 Annual | Type: Permanent | Job Title: Principal Mechanical Design Engineer Location: Barrow-In-Furness, hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on experience 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 advanced, technology-led defence, aerospace and security solutions, 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. What you will be doing: In this role, you will lead the design and development of complex mechanical fluid systems that support critical submarine platform functions. You will define system requirements, develop high-integrity engineering solutions, and ensure designs meet demanding performance, safety, and environmental standards. You will work closely with engineering and project teams to support modelling and analys... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--d09296eb-a7fb-4d6b-b4cf-d31f4a4d78e4 https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--d09296eb-a7fb-4d6b-b4cf-d31f4a4d78e4 Wed, 22 Apr 2026 11:52:46 GMT Location: Millom | Salary: 10000-500000 Annual | Type: Permanent | Job Title: Principal Mechanical Design Engineer Location: Barrow-In-Furness, hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on experience 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 advanced, technology-led defence, aerospace and security solutions, 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. What you will be doing: In this role, you will lead the design and development of complex mechanical fluid systems that support critical submarine platform functions. You will define system requirements, develop high-integrity engineering solutions, and ensure designs meet demanding performance, safety, and environmental standards. You will work closely with engineering and project teams to support modelling and analys... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--c14c459e-64ea-4a8c-9d67-c41c92ffd81b https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--c14c459e-64ea-4a8c-9d67-c41c92ffd81b Wed, 22 Apr 2026 11:52:46 GMT Location: Broughton-in-furness | Salary: 10000-500000 Annual | Type: Permanent | Job Title: Principal Mechanical Design Engineer Location: Barrow-In-Furness, hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on experience 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 advanced, technology-led defence, aerospace and security solutions, 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. What you will be doing: In this role, you will lead the design and development of complex mechanical fluid systems that support critical submarine platform functions. You will define system requirements, develop high-integrity engineering solutions, and ensure designs meet demanding performance, safety, and environmental standards. You will work closely with engineering and project teams to support modelling and analys... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--c1bcf52a-448a-4e28-a531-0757c995239a https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--c1bcf52a-448a-4e28-a531-0757c995239a Wed, 22 Apr 2026 11:52:46 GMT Location: Kirkby-in-furness | Salary: 10000-500000 Annual | Type: Permanent | Job Title: Principal Mechanical Design Engineer Location: Barrow-In-Furness, hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on experience 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 advanced, technology-led defence, aerospace and security solutions, 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. What you will be doing: In this role, you will lead the design and development of complex mechanical fluid systems that support critical submarine platform functions. You will define system requirements, develop high-integrity engineering solutions, and ensure designs meet demanding performance, safety, and environmental standards. You will work closely with engineering and project teams to support modelling and analys... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--300a78f1-b969-4cc0-8590-9f3447122ba1 https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--300a78f1-b969-4cc0-8590-9f3447122ba1 Wed, 22 Apr 2026 11:52:46 GMT Location: Grange-over-sands | Salary: 10000-500000 Annual | Type: Permanent | Job Title: Principal Mechanical Design Engineer Location: Barrow-In-Furness, hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on experience 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 advanced, technology-led defence, aerospace and security solutions, 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. What you will be doing: In this role, you will lead the design and development of complex mechanical fluid systems that support critical submarine platform functions. You will define system requirements, develop high-integrity engineering solutions, and ensure designs meet demanding performance, safety, and environmental standards. You will work closely with engineering and project teams to support modelling and analys... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--89a81d29-8105-43d4-8ca7-ab52cc0663de https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--89a81d29-8105-43d4-8ca7-ab52cc0663de Wed, 22 Apr 2026 11:52:46 GMT Location: Ulverston | Salary: 10000-500000 Annual | Type: Permanent | Job Title: Principal Mechanical Design Engineer Location: Barrow-In-Furness, hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on experience 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 advanced, technology-led defence, aerospace and security solutions, 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. What you will be doing: In this role, you will lead the design and development of complex mechanical fluid systems that support critical submarine platform functions. You will define system requirements, develop high-integrity engineering solutions, and ensure designs meet demanding performance, safety, and environmental standards. You will work closely with engineering and project teams to support modelling and analys... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--4c58e1dd-125d-4344-a4af-cb5dbbabe17d https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--4c58e1dd-125d-4344-a4af-cb5dbbabe17d Wed, 22 Apr 2026 11:52:46 GMT Location: Dalton-in-furness | Salary: 10000-500000 Annual | Type: Permanent | Job Title: Principal Mechanical Design Engineer Location: Barrow-In-Furness, hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on experience 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 advanced, technology-led defence, aerospace and security solutions, 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. What you will be doing: In this role, you will lead the design and development of complex mechanical fluid systems that support critical submarine platform functions. You will define system requirements, develop high-integrity engineering solutions, and ensure designs meet demanding performance, safety, and environmental standards. You will work closely with engineering and project teams to support modelling and analys... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--47840ddb-1764-446d-8010-e7feaffd7ffd https://jobs.co.uk/job/principal-mechanical-design-engineer-bae-systems--47840ddb-1764-446d-8010-e7feaffd7ffd Wed, 22 Apr 2026 11:52:46 GMT Location: Askam-in-furness | Salary: 10000-500000 Annual | Type: Permanent | Job Title: Principal Mechanical Design Engineer Location: Barrow-In-Furness, hybrid We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role. Salary: Circa £55,000 depending on experience 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 advanced, technology-led defence, aerospace and security solutions, 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. What you will be doing: In this role, you will lead the design and development of complex mechanical fluid systems that support critical submarine platform functions. You will define system requirements, develop high-integrity engineering solutions, and ensure designs meet demanding performance, safety, and environmental standards. You will work closely with engineering and project teams to support modelling and analys... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-reevr--9f4c9f51-92a9-4bbf-9c6d-aaf76aa3684e https://jobs.co.uk/job/principal-mechanical-design-engineer-reevr--9f4c9f51-92a9-4bbf-9c6d-aaf76aa3684e Sun, 19 Apr 2026 23:00:00 GMT Location: Farnham | Salary: £70,000 | Type: Permanent | Principal Mechanical Design Engineer Complex Electro-Mechanical Systems Are you an experienced Mechanical Design Engineer ready to take the next step in your career? We are seeking a Principal Mechanical Design Engineer to lead the design and development of complex electro-mechanical systems for highly regulated markets. This is a senior, hands-on role offering technical ownership, leadership, and... Permanent https://jobs.co.uk/job/leadprincipal-mechanical-design-engineer-4-days-on-site-wa-consultants--5a53013b-50d1-4058-9ce8-c1c19182407c https://jobs.co.uk/job/leadprincipal-mechanical-design-engineer-4-days-on-site-wa-consultants--5a53013b-50d1-4058-9ce8-c1c19182407c Fri, 17 Apr 2026 11:53:34 GMT Location: Glasgow | Salary: 60000.00-60000.00 Annual | Type: Permanent | Lead/Principal Mechanical Design EngineerLocation: Glasgow (4 days on-site, 1 day remote)Working Pattern: FlexibleMy client is currently seeking an experienced Lead/Principal Mechanical Design Engineer to join a growing engineering team based in Glasgow. This is an excellent opportunity to take on a key technical leadership role, working across a diverse range of industry projects while mentoring and developing junior engineers.The RoleAs a Lead Mechanical Design Engineer, you will play a pivotal role in driving the design and development of mechanical systems and enclosures from concept through to production. You will work closely with cross-functional teams, including manufacturing, to ensure high-quality, cost-effective, and manufacturable solutions.Key ResponsibilitiesLead the design and development of mechanical products and enclosures across the full product life cycleProduce and review 2D and 3D CAD designs, primarily using SolidWorksDefine mechanical architecture and ensure robust, scalable design solutionsWork closely with manufacturing and liaise with manufacturing engineers to support production and assembly processesDesign for manufacturability, including injection moul... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-carrington-west--4439f896-77b7-40d2-ade6-69b9c6fd3018 https://jobs.co.uk/job/principal-mechanical-design-engineer-carrington-west--4439f896-77b7-40d2-ade6-69b9c6fd3018 Tue, 14 Apr 2026 11:52:42 GMT Location: Salford | Salary: 10000-500000 Annual | Type: Permanent | Ready to take your career to the next level as a Principal Engineer / Major Projects Team Lead in Building Services?Our client is looking for a Principal Engineer (Major Projects Team Lead) to join their growing Building Services team in the North West. This is an opportunity to step into a leadership role within a well-established engineering consultancy delivering complex, high-value projects across the built environment.Working across major schemes including large-scale infrastructure, public sector frameworks, and flagship developments, you''ll play a key role in shaping technical delivery while leading and developing a high-performing MEP team. If you''re looking for a role where you can influence projects, people, and long-term strategy, this is one to consider. Why Join This Team? Work on major, complex projects across infrastructure, public sector and large-scale developments Strong pipeline of secured work, including nationally significant schemes Clear progression into senior leadership roles Opportunity to shape and grow your own team Flexible working arrangements available Ongoing professional development, chartership support, and leadership training Collaborativ... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-medical-devices-newton-colmore--31f5b326-6144-4c85-9fb1-95d6d27752c1 https://jobs.co.uk/job/principal-mechanical-design-engineer-medical-devices-newton-colmore--31f5b326-6144-4c85-9fb1-95d6d27752c1 Sun, 12 Apr 2026 23:00:00 GMT Location: Cambridge | Salary: Negotiable | Type: Permanent | Principal Mechanical Design Engineer - Medical Devices - Cambridge A growing Medical Devices team, based in Cambridge, is currently seeking an experienced Mechanical Design Engineer to lead the development of cutting-edge Medical Devices in the fields of Health Technology, Biotech, and Wearable Tech. The ideal candidate will have a proven track record of developing devices to ISO 13485 standards that have successfully reached the market, spanning various sectors within Medical Devices. In addition to past experience in inventing and designing Medical Devices, candidates are expected to hold a degree in a relevant field that led them into Mechanical Design or the Medical Devices industry. You will collaborate with a multidisciplinary team of experts, including Industrial Designers, Electronics Engineers, Physicists, Software Engineers, and Scientists. Some projects may require you to take the lead, which is why this is a principal-level design engineer role. This company places a strong emphasis on providing continuous training and development to help you advance your career. In addition to career development and the opportunity to work on cutting-edge technologi... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-hays--b78567a5-30f9-4c96-a9a8-97ec56a848c7 https://jobs.co.uk/job/principal-mechanical-design-engineer-hays--b78567a5-30f9-4c96-a9a8-97ec56a848c7 Fri, 10 Apr 2026 23:00:00 GMT Location: Banbridge | Salary: Negotiable | Type: Permanent | Your new company I''m working with a leading organisation in the commercial decarbonisation and offsite-prefabricated energy sector, who deliver innovative mechanical and electrical solutions across the UK, Ireland, and Europe. Due to continued growth, they are seeking a Principal Mechanical Design Engineer to join their expanding design team at their modern Banbridge or Newtownabbey facility. This ... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-carrington-west--47704c49-5ca6-49d7-ac61-5f5b662e4b76 https://jobs.co.uk/job/principal-mechanical-design-engineer-carrington-west--47704c49-5ca6-49d7-ac61-5f5b662e4b76 Fri, 10 Apr 2026 23:00:00 GMT Location: Salford | Salary: Negotiable | Type: Permanent | Ready to take your career to the next level as a Principal Engineer / Major Projects Team Lead in Building Services? Our client is looking for a Principal Engineer (Major Projects Team Lead) to join their growing Building Services team in the North West. This is an opportunity to step into a leadership role within a well-established engineering consultancy delivering complex, high-value projects across the built environment. Working across major schemes including large-scale infrastructure, public sector frameworks, and flagship developments, you''ll play a key role in shaping technical delivery while leading and developing a high-performing MEP team. If you''re looking for a role where you can influence projects, people, and long-term strategy, this is one to consider. Why Join This Team? ·Work on major, complex projects across infrastructure, public sector and large-scale developments ·Strong pipeline of secured work, including nationally significant schemes ·Clear progression into senior leadership roles ·Opportunity to shape and grow your own team ·Flexible working arrangements available ·Ongoing professional development, chartership support, and leadership traini... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-vector-recruitment--86498e2f-e392-4413-b666-01f5d1979e21 https://jobs.co.uk/job/principal-mechanical-design-engineer-vector-recruitment--86498e2f-e392-4413-b666-01f5d1979e21 Thu, 09 Apr 2026 11:52:29 GMT Location: Cambridge | Salary: 60000.00-60000.00 Annual | Type: Permanent | Principal Mechanical Design Engineer (Next Generation Medical Devices) Location: Cambridge Salary: £60,000 £80,000 + Excellent Benefits Contact: Adam Mayne (url removed) (phone number removed) Principal Mechanical Design Engineer Opportunity An exciting opportunity has arisen for an experienced Principal Mechanical Design Engineer to join a fast growing, innovation led product development environment, working on complex, real world engineering challenges that genuinely improve people s lives. You ll play a key role in leading mechanical product development programmes from early concept through to manufacture, working closely with multidisciplinary teams and global manufacturing partners. This role offers genuine technical ownership, customer engagement, and the chance to influence both product direction and commercial success. This is a collaborative, high calibre engineering culture that values technical excellence, creativity, and professional development, with strong support for training, mentoring, and career progression. Responsibilities of Principal / Senior Mechanical Design Engineer Leading mechanical engineering activities across full product development programme... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineers-test-equipment-mbda-uk--a79649ca-4307-4a00-9864-b9bae73e5e07 https://jobs.co.uk/job/principal-mechanical-design-engineers-test-equipment-mbda-uk--a79649ca-4307-4a00-9864-b9bae73e5e07 Tue, 07 Apr 2026 11:51:21 GMT Location: Stevenage | Salary: 55000.00-55000.00 Annual | Type: Permanent | Due to increased workload, we are looking for experienced Principal Mechanical Design Engineers to work in all areas of the Product Life Cycles with the drive and enthusiasm to join Europe''s leading missile systems provider, developing and designing Test Equipment solutions for the next generation of weapons.Salary: Up to £55,000 depending on ExperienceLocation: Stevenage (We may be able to offer a relocation package for this role)Dynamic (hybrid) working: 2-3 days per week on-site due to workload classificationSecurity Clearance: British Citizen or a Dual UK national with British citizenshipRestrictions and/or limitations relating to nationality and/or rights to work may apply. As a minimum and after offer stage, all successful candidates will need to undergo HMG Basic Personnel Security Standard checks (BPSS), which are managed by the MBDA Personnel Security Team.What we can offer you:Company bonus: Up to £2,500 (based on company performance and will vary year to year)Pension: Maximum total (employer and employee) contribution of up to 14%Overtime:Opportunity for paid overtimeFlexi Leave:Up to 15 additional daysFlexible working:We welcome applicants who are looking for flexible ... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-vector-recruitment--4b7b2f6d-72eb-4824-939e-c063e51e5bcf https://jobs.co.uk/job/principal-mechanical-design-engineer-vector-recruitment--4b7b2f6d-72eb-4824-939e-c063e51e5bcf Mon, 06 Apr 2026 23:00:00 GMT Location: Cambridge | Salary: £60000 - £80000/annum | Type: Permanent | Principal Mechanical Design Engineer ( Next-Generation Medical Devices) Location: Cambridge Salary: £60,000 – £80,000 + Excellent Benefits Contact: Adam Mayne – (url removed) – (phone number removed)     Principal Mechanical Design Engineer Opportunity     An exciting opportunity has arisen for an experienced Principal Mechanical Design Engineer to join a fast-growing, innovation-led product development environment, working on complex, real-world engineering challenges that genuinely improve people’s lives. You’ll play a key role in leading mechanical product development programmes from early concept through to manufacture, working closely with multidisciplinary teams and global manufacturing partners. This role offers genuine technical ownership, customer engagement, and the chance to influence both product direction and commercial success. This is a collaborative, high-calibre engineering culture that values technical excellence, creativity, and professional development, with strong support for training, mentoring, and career progression.    Responsibilities of Principal / Senior Mechanical Design Engineer Leading mechanical engineering activities acro... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-mbda-uk--15ef5496-ba20-42ed-b37c-69fc2a34b787 https://jobs.co.uk/job/principal-mechanical-design-engineer-mbda-uk--15ef5496-ba20-42ed-b37c-69fc2a34b787 Mon, 06 Apr 2026 11:51:27 GMT Location: Stevenage | Salary: 50000.00-50000.00 Annual | Type: Permanent | 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 experienceLocation: Stevenage (relocation package may be available)Dynamic (Hybrid) Working: An average of 2-3 days per week on-site dependent on work classificationSecurity Clearance: British Citizen or a Dual UK national with British citizenship. Restrictions and/or limitations relating to nationality and/or rights to work may apply. As a minimum and after offer stage, all successful candidates will need to undergo HMG Basic Personnel Security Standard checks (BPS... Permanent https://jobs.co.uk/job/senior-principal-mechanical-design-engineer-building-services-gr-associates--1f0b9fb8-dd4a-42d7-8eec-91c6ec4eb3fb https://jobs.co.uk/job/senior-principal-mechanical-design-engineer-building-services-gr-associates--1f0b9fb8-dd4a-42d7-8eec-91c6ec4eb3fb Sun, 05 Apr 2026 11:50:56 GMT Location: City | Salary: 50000.00-50000.00 Annual | Type: Permanent | Senior / Principal Mechanical Design Engineer required for leading West Midlands Consultancy Operating for almost 20 years, my client has been providing high quality Mechanical, Electrical and Public Health Design services for the built environment. Based from their offices in the West Midlands, they are involved in the following sectors: Commercial Education Healthcare Leisure Listed Buildings Residential Retail Transport Due to an increase in demand for their services they are looking to recruit a Senior Mechanical Design Engineer to replace a long serving engineer who is leaving the industry. You will be a key part of the delivery team and will be required to manage your own technical input, as well as that of others, and to demonstrate your understanding of the role that your work plays in the delivery of the projects as a whole. You will need an understanding of the financial and commercial considerations that affect project delivery, and be able to provide accurate and relevant reports on progress of the work against time and budgetary targets, together with being responsible for invoicing respective projects with the accounts department. You must be: A competent des... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineers-test-equipment-mbda-uk--1d97443a-45f7-4ea9-8b6a-f668f133eae8 https://jobs.co.uk/job/principal-mechanical-design-engineers-test-equipment-mbda-uk--1d97443a-45f7-4ea9-8b6a-f668f133eae8 Sat, 04 Apr 2026 23:00:00 GMT Location: Stevenage | Salary: £55000/annum | Type: Permanent | Due to increased workload, we are looking for experienced Principal Mechanical Design Engineers to work in all areas of the Product Life Cycles with the drive and enthusiasm to join Europe''s leading missile systems provider, developing and designing Test Equipment solutions for the next generation of weapons. Salary : Up to £55,000 depending on Experience Location : Stevenage (We may be able to offer a relocation package for this role) Dynamic (hybrid) working : 2-3 days per week on-site due to workload classification Security Clearance : British Citizen or a Dual UK national with British citizenship Restrictions and/or limitations relating to nationality and/or rights to work may apply. As a minimum and after offer stage, all successful candidates will need to undergo HMG Basic Personnel Security Standard checks (BPSS), which are managed by the MBDA Personnel Security Team. What we can offer you: Company bonus : Up to £2,500 (based on company performance and will vary year to year) Pension : Maximum total (employer and employee) contribution of up to 14% Overtime: Opportunity for paid overtime Flexi Leave: Up to 15 additional days Flexible working: We welcom... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-mbda-uk--6686cae8-0233-4a17-8cee-5ddb0324f98d https://jobs.co.uk/job/principal-mechanical-design-engineer-mbda-uk--6686cae8-0233-4a17-8cee-5ddb0324f98d Sat, 04 Apr 2026 23:00:00 GMT Location: Stevenage | Salary: £50000/annum | Type: Permanent | 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. Restrictions and/or limitations relating to nationality and/or rights to work may apply. As a minimum and after offer stage, all successful candidates will need to undergo HMG Basic Personnel Security St... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-skilled-careers--54a66624-5fb4-42d6-a7f2-abccbc68b081 https://jobs.co.uk/job/principal-mechanical-design-engineer-skilled-careers--54a66624-5fb4-42d6-a7f2-abccbc68b081 Thu, 02 Apr 2026 11:52:21 GMT Location: London | Salary: 60000.00-60000.00 Annual | Type: Permanent | Principal Mechanical Engineer Building Services Location: South Croydon or London Bridge Working Pattern: Hybrid (3 days in office, 2 from home) Are you a hands-on Principal Mechanical Engineer ready to lead complex, high-value building services projects while mentoring a talented team This opportunity sits within a long-established building services consultancy with more than 30 years experience delivering MEP projects across the UK. About the Organisation This respected engineering practice specialises in healthcare, commercial, leisure, high-end residential, industrial, defence and education sectors. What sets them apart: A deep engineering heritage, successfully delivering building services engineering projects for over 25 years. A strong sustainability ethos with expertise in low-carbon design, renewable technologies, and modern environmental engineering. A stable team with decades of combined experience, working with well-known national and international clients. Operating primarily across London and the South, backed by strong client relationships and repeat business. With a strong delivery-focused culture, this is the ideal setting for a senior mechanical engineer... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-skilled-careers--a1c0c90f-8479-46be-a44c-537cd618ba06 https://jobs.co.uk/job/principal-mechanical-design-engineer-skilled-careers--a1c0c90f-8479-46be-a44c-537cd618ba06 Tue, 31 Mar 2026 23:00:00 GMT Location: London | Salary: £60000 - £70000/annum | Type: Permanent | Principal Mechanical Engineer – Building Services Location:  South Croydon or London Bridge Working Pattern:  Hybrid (3 days in office, 2 from home)   Are you a hands-on Principal Mechanical Engineer ready to lead complex, high-value building services projects while mentoring a talented team This opportunity sits within a long-established building services consultancy with more than 30 years’ experience delivering MEP projects across the UK.   About the Organisation This respected engineering practice specialises in  healthcare, commercial, leisure, high-end residential, industrial, defence and education sectors .   What sets them apart: A  deep engineering heritage , successfully delivering building services engineering projects for over 25 years. A  strong sustainability ethos  with expertise in low-carbon design, renewable technologies, and modern environmental engineering. A stable team with decades of combined experience, working with well-known national and international clients. Operating primarily across London and the South, backed by strong client relationships and repeat business.   With a strong delivery-focused culture, this is the ideal setti... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-city-site-solutions-ltd--615605f2-fe7d-421b-a36d-40a2cc94f1db https://jobs.co.uk/job/principal-mechanical-design-engineer-city-site-solutions-ltd--615605f2-fe7d-421b-a36d-40a2cc94f1db Tue, 31 Mar 2026 23:00:00 GMT Location: Motherwell | Salary: Negotiable | Type: Permanent | City Site Solutions - Scotland are looking to recruit a Principal Mechanical Design Engineer on staff basis for one of our clients based in Motherwell. Duties Manage and deliver design work throughout design and build projects in collaboration with the project teams and take full accountability for the design of mechanical services for data centres and other mission critical projects. Undertake design reviews and appraisals and provide technical advice/assistance to the projects teams. Take responsibility for checking calculations and provide monthly design progress reports in each projects reporting on technical risks and opportunities. Provide design/technical assessment support of tenders and delivery high quality design solutions that address contractual obligations and mitigating technical risk. Be the senior engineer on projects and lead regular design meetings with the project team. Requirements Recognised qualification in mechanical / building services engineering. i.e. BEng / Meng is desirable. Proven experience in mechanical services design in line with appropriate standards, guidance and client`s requirements. Experience of working on multiple pr... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-carrington-west--42519d99-0b7c-48b2-a7cf-2ef9e8d5baf6 https://jobs.co.uk/job/principal-mechanical-design-engineer-carrington-west--42519d99-0b7c-48b2-a7cf-2ef9e8d5baf6 Fri, 27 Mar 2026 00:00:00 GMT Location: Almondsbury | Salary: £50000 - £60000/annum | Type: Permanent | Senior / Principal Mechanical Engineer Location: Bristol (Hybrid Working) We are representing a small consultancy in Bristol known for its technical expertise and strong client relationships. They are looking for an experienced Senior/Principal Mechanical Engineer who is motivated, ambitious, and ready to take ownership of projects from feasibility through to completion. The ideal candidate will have a strong technical background, experience leading and supervising teams, and a proven ability to deliver projects in a variety of sectors. This is a fantastic opportunity for someone looking to play a key role in a growing team, with a competitive salary and flexible working options. Role Overview The successful candidate will have a client-facing, technical role, working independently to manage and deliver projects. You will also supervise the work of others on your projects, ensuring all deliverables meet the required quality standards. You should be able to take projects forward efficiently, work autonomously, and be proactive in representing the business to clients. The business is focused on finding the right person for the role and is willing to offer a competitive sala... Permanent https://jobs.co.uk/job/seniorprincipal-mechanical-design-engineer-enterprise-recruitment-limited--d6cde416-1fac-4aeb-bbde-a3bea2e749e7 https://jobs.co.uk/job/seniorprincipal-mechanical-design-engineer-enterprise-recruitment-limited--d6cde416-1fac-4aeb-bbde-a3bea2e749e7 Thu, 26 Mar 2026 00:00:00 GMT Location: Prudhoe | Salary: £80,000 | Type: Permanent | Senior/Principal Mechanical Design Engineer Imagine being the go-to mechanical expert in a rapidly growing engineering team, trusted to make decisions, shape design culture, and bring technically innovative products to life. This is a unique opportunity to work on highly complex, high-spec electro-mechanical systems that push the boundaries of engineering. You will lead the mechanical design and dev... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-reevr--aa053b73-36b3-4f89-8d4e-5a4ead8aa114 https://jobs.co.uk/job/principal-mechanical-design-engineer-reevr--aa053b73-36b3-4f89-8d4e-5a4ead8aa114 Tue, 24 Mar 2026 00:00:00 GMT Location: Farnham | Salary: £70,000 | Type: Permanent | Principal Mechanical Design Engineer Complex Electro-Mechanical Systems Are you an experienced Mechanical Design Engineer ready to take the next step in your career? We are seeking a Principal Mechanical Design Engineer to lead the design and development of complex electro-mechanical systems for highly regulated markets. This is a senior, hands-on role offering technical ownership, leadership, and... Permanent